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Cheap flights from Seattle to London Heathrow Airport from C$ 293

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — LHR
15 May — 22 May1
1 adult
Wed 15/5
Wed 22/5

The best prices from Seattle/Tacoma Intl to London Heathrow are usually found in January or February, booked 75 days in advance, depart on a Tuesday or Monday and return on a Wednesday

Cheap flight deals from Seattle to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 10 May 2024.

Popular in

June

Cheapest in

January

Round-trip from

C$ 759

One-way from

C$ 588
High demand for flights, 28% potential price rise
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Best time to find cheap flights, 20% potential price drop
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From Seattle/Tacoma Intl to London Heathrow
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One-way flight from Seattle/Tacoma Intl to London Heathrow
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What is the cheapest day to fly round-trip from Seattle to London Heathrow Airport?

Users have found that flying from Seattle to London Heathrow Airport on a Tuesday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Seattle to London Heathrow Airport?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 8 days in advance, which can save you up to 65% on flights from Seattle to London Heathrow Airport compared to booking the week you need them. Waiting 8 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 885. For sooner than that we have options available in the next 3 days from C$ 1,589.

What is the cheapest month to fly from Seattle to London Heathrow Airport?

November is one of the best times of the year to fly to London Heathrow Airport from Seattle. Prices for November average C$ 1,180 per person but you can even find prices for as low as C$ 768. The most expensive prices can be found in the month of June. Opting for a November flight can save you 39% on your journey compared to booking in June

When is the cheapest time to fly from Seattle to London Heathrow Airport (SEA - LHR)?

Unlike in the morning, when flights are generally more expensive, you can save up to 28% on flights from Seattle to London Heathrow Airport by exploring options for tickets in the evening.

Cheap British Airways flights from Seattle to Heathrow

Explore cheap flight options specifically provided by British Airways for the route between Seattle and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 437,143 searches. Data last updated 10 May 2024.
Peruse some of the lowest-priced British Airways flights we've found from Seattle to London. It's recommended that users confirm their flight details before booking.
Sun 29/91:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 10/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 9/5C$ 842
Sun 22/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 2/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 843
Wed 2/103:41 p.m.SEA - LHR
1 stop14h 44mBritish Airways
Fri 18/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 847
Tue 1/107:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 9/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 9/5C$ 854
Tue 24/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 2/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 857
Wed 25/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 2/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 869
Thu 3/101:30 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Tue 22/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 9/5C$ 910
Wed 23/107:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Sun 10/112:50 p.m.LHR - SEA
Nonstop9h 55mBritish Airways
Deal found 8/5C$ 912
Sun 22/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Mon 30/99:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 913

  • One of the most popular airlines travelling from Seattle to London Heathrow Airport is British Airways. Flights from British Airways travelling this route typically cost C$ 784.79 RT. This price is typically 107% more expensive than other airlines that offer Seattle to London Heathrow Airport flights. When booking this route, the cheapest RT price found was C$ 658. The most popular departure airport in Seattle when flying to London Heathrow Airport is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London Heathrow Airport is London Heathrow Airport. When flying from Seattle to London Heathrow Airport, British Airways flights are 10% more popular than any other airline flying that same route.

Cheap Finnair flights from Seattle to Heathrow

Explore cheap flight options specifically provided by Finnair for the route between Seattle and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 437,143 searches. Data last updated 10 May 2024.
Take a gander at the lowest prices we've found on Finnair flights from Seattle to London. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Sun 27/1010:30 a.m.SEA - LHR
1 stop13h 50mFinnair
Thu 7/112:50 p.m.LHR - SEA
Nonstop9h 55mFinnair
Deal found 9/5C$ 848
Tue 29/107:45 p.m.SEA - LHR
Nonstop9h 20mFinnair
Thu 7/1110:40 a.m.LHR - SEA
1 stop16h 23mFinnair
Deal found 9/5C$ 855
Tue 1/109:56 a.m.SEA - LHR
1 stop14h 04mFinnair
Fri 11/1010:30 a.m.LHR - SEA
1 stop16h 22mFinnair
Deal found 9/5C$ 862
Mon 23/99:56 a.m.SEA - LHR
1 stop14h 04mFinnair
Thu 3/1010:30 a.m.LHR - SEA
1 stop16h 22mFinnair
Deal found 10/5C$ 864
Sun 6/109:56 a.m.SEA - LHR
1 stop14h 04mFinnair
Tue 22/109:50 a.m.LHR - SEA
Nonstop9h 45mFinnair
Deal found 9/5C$ 887
Wed 9/107:40 p.m.SEA - LHR
Nonstop9h 20mFinnair
Thu 17/1010:30 a.m.LHR - SEA
1 stop16h 22mFinnair
Deal found 9/5C$ 894
Sun 27/1010:30 a.m.SEA - LHR
1 stop13h 50mFinnair
Fri 8/1110:40 a.m.LHR - SEA
1 stop16h 23mFinnair
Deal found 9/5C$ 901
Sun 22/99:56 a.m.SEA - LHR
1 stop14h 04mFinnair
Thu 3/1010:30 a.m.LHR - SEA
1 stop16h 22mFinnair
Deal found 10/5C$ 902
Thu 31/107:45 p.m.SEA - LHR
Nonstop9h 20mFinnair
Fri 8/1110:40 a.m.LHR - SEA
1 stop16h 23mFinnair
Deal found 9/5C$ 962

  • Finnair is one of the most popular airlines used for those travelling from Seattle to London Heathrow Airport. Seattle to London Heathrow Airport flights are typically 122% cheaper than other airlines traveling the same route. Flights from Finnair typically cost C$ 697.47 RT. The cheapest Finnair flight found for this route was C$ 603. Seattle/Tacoma Intl Airport is the most common Seattle airport to take off from when flying to London Heathrow Airport. London Heathrow Airport is the most popular arrival airport in London Heathrow Airport. When flying from Seattle to London Heathrow Airport, Finnair flights are 5% more popular than any other airline flying that same route.

Cheap Seattle to Heathrow flights in May & June 2024

Find cheap flight options from Seattle to Heathrow specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 437,143 searches. Prices were last updated on 10 May 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Tue 21/57:40 a.m.SEA - LHR
1 stop14h 50mUnited Airlines
Tue 4/69:00 a.m.LHR - SEA
1 stop15h 59mUnited Airlines
Deal found 9/5C$ 1,038
Wed 15/57:15 a.m.SEA - LHR
2 stops19h 25mUnited Airlines
Fri 31/57:25 a.m.LHR - SEA
1 stop17h 34mUnited Airlines
Deal found 9/5C$ 1,043
Tue 14/56:38 a.m.SEA - LHR
2 stops18h 22mUnited Airlines
Fri 14/62:05 p.m.LHR - SEA
1 stop15h 11mUnited Airlines
Deal found 8/5C$ 1,055
Wed 15/56:38 a.m.SEA - LHR
2 stops21h 07mUnited Airlines
Fri 31/57:25 a.m.LHR - SEA
2 stops23h 25mUnited Airlines
Deal found 10/5C$ 1,057
Wed 15/57:25 a.m.SEA - LHR
2 stops20h 55mMultiple Airlines
Wed 29/52:05 p.m.LHR - SEA
1 stop15h 11mMultiple Airlines
Deal found 9/5C$ 1,062
Wed 15/52:50 p.m.SEA - LHR
2 stops33h 05mSWISS
Mon 17/66:40 p.m.LHR - SEA
2 stops31h 46mSWISS
Deal found 8/5C$ 1,065
Wed 15/58:20 a.m.SEA - LHR
1 stop20h 00mUnited Airlines
Fri 31/56:30 a.m.LHR - SEA
1 stop13h 55mUnited Airlines
Deal found 10/5C$ 1,068
Wed 15/59:10 p.m.SEA - LHR
Nonstop9h 40mDelta
Thu 23/511:30 a.m.LHR - SEA
1 stop14h 10mDelta
Deal found 10/5C$ 1,073
Wed 15/56:38 a.m.SEA - LHR
2 stops21h 07mUnited Airlines
Thu 23/510:25 a.m.LHR - SEA
1 stop16h 15mUnited Airlines
Deal found 9/5C$ 1,076

Seattle to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 437,143 searches. Data last updated 10 May 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.
Sun 29/91:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 10/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 9/5C$ 842
Sun 22/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 3/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 843
Wed 2/103:41 p.m.SEA - LHR
1 stop14h 44mBritish Airways
Fri 18/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 847
Sun 10/117:50 a.m.SEA - LHR
1 stop14h 30mFinnair
Thu 21/112:50 p.m.LHR - SEA
Nonstop9h 55mFinnair
Deal found 9/5C$ 848
Mon 23/99:56 a.m.SEA - LHR
1 stop14h 04mIberia
Tue 1/109:50 a.m.LHR - SEA
Nonstop9h 45mIberia
Deal found 10/5C$ 851
Tue 1/107:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 30/102:50 p.m.LHR - SEA
Nonstop9h 55mBritish Airways
Deal found 9/5C$ 854
Tue 29/107:45 p.m.SEA - LHR
Nonstop9h 20mFinnair
Thu 7/1110:40 a.m.LHR - SEA
1 stop16h 23mFinnair
Deal found 9/5C$ 855
Tue 24/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 2/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 857
Tue 1/109:56 a.m.SEA - LHR
1 stop14h 04mFinnair
Fri 11/1010:30 a.m.LHR - SEA
1 stop16h 22mFinnair
Deal found 9/5C$ 862

Direct flights to Heathrow from Seattle

Discover non-stop flight options from Seattle to Heathrow. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 437,143 searches. Data last updated 10 May 2024.
To help reduce your travel time, choose from one of these non-stop flights from Seattle to London. Those looking to potentially save on 1 or 2-stop flights from Seattle to London should utilize the search form at the top of the page.
Sun 29/91:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 10/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 9/5C$ 842
Sun 22/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 2/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 843
Tue 1/107:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 30/102:50 p.m.LHR - SEA
Nonstop9h 55mBritish Airways
Deal found 9/5C$ 854
Tue 24/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 2/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 857
Wed 25/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 3/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 869
Thu 3/101:30 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Tue 22/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 9/5C$ 910
Wed 23/107:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Sun 10/112:50 p.m.LHR - SEA
Nonstop9h 55mBritish Airways
Deal found 8/5C$ 912
Sun 22/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Mon 30/99:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 10/5C$ 913
Mon 23/99:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Tue 22/104:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 9/5C$ 924

Seattle to Heathrow flights leaving soon

Find last-minute flight options from Seattle to Heathrow for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 437,143 searches. Data last updated 10 May 2024.
Have a look at some of the flights available from Seattle to London departing last-minute. It's wise to confirm all flight details are correct before booking.
Wed 15/57:15 a.m.SEA - LHR
2 stops19h 25mUnited Airlines
Fri 31/57:25 a.m.LHR - SEA
1 stop17h 34mUnited Airlines
Deal found 9/5C$ 1,043
Wed 15/56:38 a.m.SEA - LHR
1 stop16h 47mUnited Airlines
Thu 23/57:25 a.m.LHR - SEA
2 stops23h 25mUnited Airlines
Deal found 10/5C$ 1,057
Wed 15/58:20 a.m.SEA - LHR
1 stop20h 00mMultiple Airlines
Wed 29/59:30 a.m.LHR - SEA
1 stop19h 46mMultiple Airlines
Deal found 9/5C$ 1,062
Wed 15/52:50 p.m.SEA - LHR
2 stops33h 05mSWISS
Mon 17/66:40 p.m.LHR - SEA
2 stops31h 46mSWISS
Deal found 8/5C$ 1,065
Wed 15/57:15 a.m.SEA - LHR
2 stops19h 25mUnited Airlines
Fri 24/56:30 a.m.LHR - SEA
1 stop13h 55mUnited Airlines
Deal found 10/5C$ 1,068
Wed 15/59:10 p.m.SEA - LHR
Nonstop9h 40mDelta
Fri 31/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 10/5C$ 1,073
Wed 15/56:38 a.m.SEA - LHR
2 stops21h 07mUnited Airlines
Thu 23/510:25 a.m.LHR - SEA
1 stop16h 15mUnited Airlines
Deal found 9/5C$ 1,076
Wed 15/59:10 p.m.SEA - LHR
Nonstop9h 40mDelta
Mon 17/69:55 a.m.LHR - SEA
1 stop32h 25mDelta
Deal found 8/5C$ 1,077
Mon 20/512:40 a.m.SEA - LHR
1 stop22h 35mDelta
Tue 28/511:30 a.m.LHR - SEA
1 stop14h 10mDelta
Deal found 9/5C$ 1,080

One-way flights to Heathrow from Seattle

Search for one-way flight options from Seattle to Heathrow. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 437,143 searches. Data last updated 10 May 2024.
Some of the best available deals we've found on one-way flights from Seattle to London. Those seeking round-trip flights from Seattle to London should utilize the search form at the top of the page.
Sun 25/86:15 p.m.SEA - LHR
3 stops41h 10mMultiple Airlines
Deal found 9/5C$ 293
Mon 23/96:55 p.m.SEA - LHR
1 stop17h 25mIcelandair
Deal found 9/5C$ 350
Sat 24/81:35 p.m.SEA - LHR
3 stops46h 45mMultiple Airlines
Deal found 9/5C$ 356
Sun 13/103:50 p.m.SEA - LHR
1 stop12h 05mIcelandair
Deal found 9/5C$ 360
Sun 22/96:55 p.m.SEA - LHR
1 stop17h 25mIcelandair
Deal found 9/5C$ 367
Wed 25/93:50 p.m.SEA - LHR
1 stop12h 05mIcelandair
Deal found 9/5C$ 389
Fri 18/103:50 p.m.SEA - LHR
1 stop12h 05mIcelandair
Deal found 9/5C$ 429
Fri 20/96:55 p.m.SEA - LHR
1 stop17h 25mIcelandair
Deal found 9/5C$ 456
Thu 26/93:50 p.m.SEA - LHR
1 stop12h 05mIcelandair
Deal found 9/5C$ 462

Find flights from Seattle to Heathrow within your budget

Customize your flight search to find flights from Seattle to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 437,143 searches. Data last updated 10 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 842 - C$ 914

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 29/9

Nonstop9h 20m

London Heathrow

Thu 10/10

Nonstop9h 45m

C$ 842

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 27/10

1 stop13h 50m

London Heathrow

Thu 7/11

Nonstop9h 55m

C$ 848

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 23/9

1 stop14h 04m

London Heathrow

Tue 1/10

Nonstop9h 45m

C$ 851

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 6/10

1 stop12h 05m

London Heathrow

Tue 22/10

1 stop12h 50m

C$ 865

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 22/9

1 stop14h 50m

London Heathrow

Tue 1/10

2 stops17h 46m

C$ 875

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 16/10

2 stops17h 10m

London Heathrow

Wed 23/10

2 stops33h 40m

C$ 879

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 4/11

1 stop12h 30m

London Heathrow

Fri 15/11

2 stops19h 26m

C$ 892

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 13/10

2 stops19h 10m

London Heathrow

Mon 21/10

2 stops38h 21m

C$ 899

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 29/9

Nonstop9h 35m

London Heathrow

Thu 10/10

1 stop14h 20m

C$ 914

Flights are sorted by cheapest first

Deals found on 9/5

When is the best time to book a flight from Seattle to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Heathrow. Price data was last updated on 3 May 2024.
The best time to book flights from Seattle to London Heathrow Airport is 75 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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When is the cheapest time to fly from Seattle to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Heathrow. Price data was last updated on 5 May 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London Heathrow Airport flight should consider departing on Saturday evenings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to Heathrow by month

Plan your trip from Seattle to Heathrow by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Heathrow is currently C$ 385 while a round-trip flight costs C$ 874. Price data was last updated on 5 May 2024.

Currently, January is the cheapest month in which you can book a flight from Seattle to London Heathrow Airport (average of C$ 560). Flying from Seattle to London Heathrow Airport in July is currently the most expensive (average of C$ 937). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

C$ 768

February

C$ 836

March

C$ 935

April

C$ 917

May

C$ 977

June

C$ 1,091

July

C$ 1,284

August

C$ 1,112

September

C$ 992

October

C$ 920

November

C$ 903

December

C$ 981

Temperature and rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature and rainfall totals by month.

LON

Temperature

4 - 17 °C

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 10 May 2024.
To help decide which airline to fly from Seattle to London, see what other customers have to say about British Airways, Finnair and Icelandair. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,768 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.1
Very good
10,768 reviews
Delta
8.1
Very good
10,768 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,589 reviews
Delta
8.1
Very good
10,768 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

SWISS
7.8
Good
2,003 reviews
Delta
8.1
Very good
10,768 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Finnair
7.8
Good
1,377 reviews
Delta
8.1
Very good
10,768 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

JetBlue
7.6
Good
4,517 reviews
Delta
8.1
Very good
10,768 reviews
Check prices

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Overall

8.1

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to London Heathrow?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to London Heathrow. You should not have trouble finding flights to London Heathrow from Seattle/Tacoma Intl; the airport handles an average of 19 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 7 airlines have flights from the Seattle airport to London Heathrow. It is only a 18.4 km journey to Seattle/Tacoma Intl (SEA) from Seattle’s city centre.

  • Can I find flights from Seattle to London Heathrow Airport for under C$ 900 on Cheapflights?

    Yes, there are multiple flights from Seattle to London Heathrow Airport for under C$ 900. The cheapest flight booked recently is on British Airways for just C$ 842, but on average you can expect to pay C$ 868.

  • Are there direct flights from Seattle to London Heathrow Airport for under C$ 900 on Cheapflights?

    Cheapflights has 20 direct flights from Seattle to London Heathrow Airport under C$ 900. A good price for a direct flight from Seattle to London Heathrow Airport is less than C$ 928.

  • Are there last-minute flights available from Seattle to London Heathrow Airport for under C$ 1,100?

    There are currently 20+ open flights from Seattle to London Heathrow Airport within the next 7 days for less than C$ 1,100.

  • What days are direct flights available from Seattle to London Heathrow Airport?

    You can find direct flights on the following days: Tuesday, Friday, Saturday.

  • How many flights depart from Seattle to London Heathrow Airport on average per day?

    On average, you can expect to see 5 flights from Seattle to London Heathrow Airport a day.
    Afternoon (Noon - 6pm) - 40% of flight departures
    Evening (6pm - Midnight) - 60% of flight departures

  • How long is the flight from Seattle to London Heathrow Airport?

    There are many flights that can get you from Seattle to London Heathrow Airport in 9h 20m. Fly via British Airways, Finnair, or Iberia to get the fastest option. Airlines will cover a distance of 7744 km. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to London Heathrow Airport round-trip?

    Flying on British Airways is currently your cheapest option to London Heathrow Airport, with prices starting at C$ 842. Additional round-trip tickets that might be worth considering are offered by Finnair and Iberia, with the lowest prices starting at C$ 848 and C$ 851, respectively. Users have found that British Airways is 30% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to London Heathrow Airport one-way?

    One-way options have recently been found by users for as low as C$ 350 on Icelandair. Other airlines that offer cheap prices include WestJet from C$ 566 and Lufthansa from C$ 648 one-way.

  • What are the most popular airlines that fly from Seattle to London Heathrow Airport?

    When booking a flight from Seattle to London Heathrow Airport, you may want to consider flying on Air France, Finnair or British Airways as they are the most popular for this route.

  • What are the most reliable airlines from Seattle to London Heathrow Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to London Heathrow Airport on time: Air France (74%), Delta (74%), KLM (74%).

  • What are the cheapest flights from Seattle to London Heathrow Airport?

    While on average a flight from Seattle to London Heathrow Airport is generally C$ 2,731, our data shows the cheapest flight currently is C$ 669. When looking at the most popular route, (Seattle/Tacoma Intl - London Heathrow), you can expect to pay C$ 938 for that flight.

  • What does SEA to LHR mean?

    Seattle/Tacoma Intl Airport is SEA and London Heathrow Airport is LHR. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

  • Can I find deals for flights from Seattle to Heathrow that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to Heathrow flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to Heathrow with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Heathrow flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Seattle to Heathrow that include hotel bookings?

    Yes. In addition to deals on Seattle to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Heathrow.

  • Can I find deals for business class flights from Seattle to Heathrow?

    Yes. Cheapflights offers flight deals from Seattle to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Seattle to Heathrow that allow pets onboard?

    Many airlines flying from Seattle to Heathrow offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to Heathrow?

    Yes, you can often find last-minute deals on Seattle to Heathrow flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to London Heathrow Airport flight deals updated?

    The Seattle to London Heathrow Airport flight deals you see on this page were last updated on 10/5.

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Alternative routes for Seattle to Heathrow
See prices for flight routes from nearby airports that may be better suited for you.

Seattle to Gatwick flights

Top 7 airlines flying from Seattle to Heathrow

Discover the top 7 airlines that operate flights from Seattle to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 437,143 searches. Data last updated 10 May 2024.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 669AverageC$ 1,118FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapestC$ 704AverageC$ 1,077FlexibilityNo cancel feeOn-time77%
Search Air France flights
IberiaCheapestC$ 746AverageC$ 1,072FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapestC$ 827AverageC$ 956FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapestC$ 862AverageC$ 1,151FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapestC$ 903AverageC$ 1,076FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
British AirwaysCheapestC$ 952AverageC$ 1,256FlexibilityNo cancel feeOn-time70%
Search British Airways flights
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Search flights from Seattle to Heathrow by cabin class

Find flights from Seattle to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Seattle to Heathrow

Find hourly flight availability from Seattle to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 10 May 2024.
1%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
52%of flight departuresAfternoonNoon to 6 pm
47%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Seattle to Heathrow

Explore weekly flight availability from Seattle to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 10 May 2024.
Sunday20daily flights
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Heathrow?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from Seattle today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Seattle to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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