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Cheap flights from Seattle to London Heathrow Airport from C$ 478

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 14/7. 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
23 May — 30 May1
1 adult
Thu 23/5
Thu 30/5

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 18 May 2024.

Popular in

June

Cheapest in

January

Round-trip from

C$ 754

One-way from

C$ 485
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 55% 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$ 880. For sooner than that we have options available in the next 3 days from C$ 1,579.

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$ 1,172 per person but you can even find prices for as low as C$ 763. 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 18% on flights from Seattle to London Heathrow Airport by exploring options for tickets in the afternoon.

Cheap KLM flights from Seattle to Heathrow

Explore cheap flight options specifically provided by KLM 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 407,867 searches. Data last updated 18 May 2024.
Peruse some of the lowest-priced KLM flights we've found from Seattle to London. It's recommended that users confirm their flight details before booking.
Mon 12/89:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Sun 1/94:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 16/5C$ 1,012
Tue 6/89:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Sat 31/84:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 17/5C$ 1,013
Tue 6/81:35 p.m.SEA - LHR
1 stop12h 25mKLM
Sat 31/84:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 18/5C$ 1,020
Tue 13/81:35 p.m.SEA - LHR
1 stop12h 25mKLM
Fri 23/84:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 18/5C$ 1,058
Tue 6/89:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Thu 22/84:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 17/5C$ 1,086
Tue 13/89:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Wed 2/104:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 16/5C$ 1,105
Sun 11/89:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Sun 25/88:40 a.m.LHR - SEA
1 stop15h 55mKLM
Deal found 17/5C$ 1,113
Tue 21/59:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Sun 26/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 17/5C$ 1,120
Sat 10/89:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Sat 24/84:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 17/5C$ 1,188

  • KLM 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 129% more expensive than other airlines travelling the same route. Flights from KLM typically cost C$ 784.79 RT. The cheapest KLM flight found for this route 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, KLM flights are 8% more popular than any other airline flying that same route.

Cheap Air France flights from Seattle to Heathrow

Explore cheap flight options specifically provided by Air France 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 407,867 searches. Data last updated 18 May 2024.
Take a gander at the lowest prices we've found on Air France 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 11/89:15 p.m.SEA - LHR
Nonstop9h 35mAir France
Mon 26/83:20 p.m.LHR - SEA
1 stop28h 00mAir France
Deal found 17/5C$ 1,015
Sun 11/81:50 p.m.SEA - LHR
1 stop15h 25mAir France
Mon 26/87:45 p.m.LHR - SEA
2 stops31h 46mAir France
Deal found 17/5C$ 1,019
Sat 10/81:50 p.m.SEA - LHR
1 stop32h 35mAir France
Mon 26/87:45 p.m.LHR - SEA
2 stops31h 46mAir France
Deal found 18/5C$ 1,028
Sat 10/89:15 p.m.SEA - LHR
Nonstop9h 35mAir France
Mon 26/85:35 p.m.LHR - SEA
1 stop25h 45mAir France
Deal found 17/5C$ 1,083
Sat 10/87:20 a.m.SEA - LHR
1 stop18h 55mAir France
Mon 26/87:45 p.m.LHR - SEA
2 stops31h 46mAir France
Deal found 17/5C$ 1,087

  • One of the most popular airlines travelling from Seattle to London Heathrow Airport is Air France. Seattle to London Heathrow Airport flights are typically 145% more expensive than other airlines travelling the same route. Flights from Air France typically cost C$ 697.47 RT. The cheapest Air France 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, Air France flights are 4% 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 407,867 searches. Prices were last updated on 18 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.
Mon 20/51:30 p.m.SEA - LHR
1 stop12h 30mKLM
Tue 18/64:50 p.m.LHR - SEA
Nonstop10h 20mKLM
Deal found 17/5C$ 960
Tue 21/512:50 p.m.SEA - LHR
1 stop15h 30mUnited Airlines
Tue 4/610:50 a.m.LHR - SEA
1 stop14h 09mUnited Airlines
Deal found 17/5C$ 1,039
Tue 21/59:10 p.m.SEA - LHR
Nonstop9h 40mDelta
Tue 28/56:15 a.m.LHR - SEA
1 stop19h 25mDelta
Deal found 18/5C$ 1,042
Tue 21/59:10 p.m.SEA - LHR
Nonstop9h 40mDelta
Fri 31/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 18/5C$ 1,043
Tue 21/59:10 p.m.SEA - LHR
Nonstop9h 40mDelta
Wed 29/511:45 a.m.LHR - SEA
1 stop12h 55mDelta
Deal found 18/5C$ 1,046
Mon 20/57:45 a.m.SEA - LHR
1 stop17h 10mDelta
Wed 19/611:30 a.m.LHR - SEA
1 stop14h 05mDelta
Deal found 17/5C$ 1,047
Tue 21/57:10 a.m.SEA - LHR
1 stop16h 05mDelta
Tue 4/69:00 a.m.LHR - SEA
1 stop16h 35mDelta
Deal found 18/5C$ 1,049
Tue 21/59:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Tue 4/64:50 p.m.LHR - SEA
Nonstop10h 20mKLM
Deal found 17/5C$ 1,052
Tue 21/59:10 p.m.SEA - LHR
Nonstop9h 40mDelta
Mon 27/55:35 p.m.LHR - SEA
1 stop25h 45mDelta
Deal found 17/5C$ 1,058

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 407,867 searches. Data last updated 18 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 3/113:20 p.m.SEA - LHR
1 stop12h 30mLufthansa
Thu 14/1111:10 a.m.LHR - SEA
1 stop13h 55mLufthansa
Deal found 16/5C$ 819
Sun 20/103:10 p.m.SEA - LHR
1 stop14h 10mLufthansa
Thu 31/1011:10 a.m.LHR - SEA
1 stop13h 55mLufthansa
Deal found 17/5C$ 820
Wed 2/1012:44 p.m.SEA - LHR
1 stop13h 41mMultiple Airlines
Thu 10/108:40 a.m.LHR - SEA
2 stops17h 46mMultiple Airlines
Deal found 17/5C$ 823
Tue 1/105:00 a.m.SEA - LHR
1 stop20h 40mMultiple Airlines
Tue 5/1111:10 a.m.LHR - SEA
1 stop13h 55mMultiple Airlines
Deal found 17/5C$ 827
Tue 24/99:15 p.m.SEA - LHR
Nonstop9h 35mVirgin Atlantic
Tue 1/106:15 a.m.LHR - SEA
1 stop13h 05mVirgin Atlantic
Deal found 17/5C$ 828
Tue 1/104:30 p.m.SEA - LHR
Nonstop9h 20mDelta
Tue 8/106:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 17/5C$ 829
Sun 6/109:10 p.m.SEA - LHR
Nonstop9h 40mDelta
Fri 25/108:40 a.m.LHR - SEA
1 stop16h 10mDelta
Deal found 16/5C$ 831
Sun 29/99:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Wed 9/109:55 a.m.LHR - SEA
1 stop14h 55mKLM
Deal found 17/5C$ 832
Tue 24/99:15 p.m.SEA - LHR
Nonstop9h 35mDelta
Wed 9/109:55 a.m.LHR - SEA
1 stop14h 55mDelta
Deal found 18/5C$ 834

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 407,867 searches. Data last updated 18 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.
Mon 4/116:05 p.m.SEA - LHR
Nonstop9h 35mDelta
Fri 15/1111:35 a.m.LHR - SEA
Nonstop9h 55mDelta
Deal found 17/5C$ 838
Tue 1/107:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 10/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 17/5C$ 839
Sat 5/101:50 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 24/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 16/5C$ 906
Fri 27/91:30 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Fri 11/104:00 p.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 17/5C$ 907
Tue 20/89:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Wed 4/94:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 16/5C$ 944
Tue 20/89:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Wed 4/94:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 17/5C$ 945
Thu 3/109:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Sun 13/104:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 16/5C$ 974
Sat 21/99:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Mon 30/94:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 17/5C$ 975
Mon 26/89:15 p.m.SEA - LHR
Nonstop9h 35mDelta
Wed 11/912:45 p.m.LHR - SEA
Nonstop9h 55mDelta
Deal found 17/5C$ 979

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 407,867 searches. Data last updated 18 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.
Sat 25/56:50 a.m.SEA - LHR
2 stops18h 05mMultiple Airlines
Wed 29/59:55 a.m.LHR - SEA
2 stops20h 27mMultiple Airlines
Deal found 17/5C$ 1,317
Sun 26/56:50 a.m.SEA - LHR
2 stops18h 05mMultiple Airlines
Sat 8/66:40 a.m.LHR - SEA
2 stops22h 26mMultiple Airlines
Deal found 18/5C$ 1,347
Sat 25/56:50 a.m.SEA - LHR
2 stops18h 05mMultiple Airlines
Tue 28/59:55 a.m.LHR - SEA
2 stops22h 00mMultiple Airlines
Deal found 17/5C$ 1,387
Thu 23/56:50 a.m.SEA - LHR
2 stops18h 05mMultiple Airlines
Thu 30/56:40 a.m.LHR - SEA
2 stops21h 51mMultiple Airlines
Deal found 18/5C$ 1,388
Mon 27/511:25 a.m.SEA - LHR
2 stops20h 15mMultiple Airlines
Tue 4/69:30 a.m.LHR - SEA
2 stops21h 20mMultiple Airlines
Deal found 17/5C$ 1,389
Mon 27/511:25 a.m.SEA - LHR
2 stops21h 15mMultiple Airlines
Wed 5/67:30 a.m.LHR - SEA
2 stops23h 20mMultiple Airlines
Deal found 17/5C$ 1,417
Sat 25/56:50 a.m.SEA - LHR
2 stops18h 05mMultiple Airlines
Mon 27/59:05 p.m.LHR - SEA
2 stops30h 00mMultiple Airlines
Deal found 18/5C$ 1,430
Sat 25/56:50 a.m.SEA - LHR
2 stops18h 05mMultiple Airlines
Mon 10/66:40 a.m.LHR - SEA
2 stops21h 51mMultiple Airlines
Deal found 17/5C$ 1,442
Thu 23/56:50 a.m.SEA - LHR
2 stops18h 05mMultiple Airlines
Sat 8/66:40 a.m.LHR - SEA
2 stops21h 51mMultiple Airlines
Deal found 18/5C$ 1,456

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 407,867 searches. Data last updated 18 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 14/76:55 p.m.SEA - LHR
1 stop33h 00mIcelandair
Deal found 18/5C$ 478
Mon 12/86:55 p.m.SEA - LHR
1 stop17h 25mIcelandair
Deal found 18/5C$ 485
Sat 9/117:25 a.m.SEA - LHR
2 stops21h 25mWestJet
Deal found 17/5C$ 505
Tue 25/67:00 a.m.SEA - LHR
2 stops46h 25mMultiple Airlines
Deal found 16/5C$ 576
Tue 18/67:38 a.m.SEA - LHR
2 stops44h 27mWestJet
Deal found 18/5C$ 584
Tue 4/67:00 a.m.SEA - LHR
2 stops30h 35mMultiple Airlines
Deal found 17/5C$ 599
Tue 18/67:38 a.m.SEA - LHR
2 stops44h 27mWestJet
Deal found 17/5C$ 612
Sun 29/99:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Deal found 17/5C$ 617
Sun 14/76:40 p.m.SEA - LHR
3 stops33h 15mMultiple Airlines
Deal found 18/5C$ 620

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 407,867 searches. Data last updated 18 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 1,012 - C$ 1,284

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 12/8

Nonstop9h 35m

London Heathrow

Sun 1/9

Nonstop10h 30m

C$ 1,012

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 11/8

Nonstop9h 35m

London Heathrow

Mon 26/8

1 stop28h 00m

C$ 1,015

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 14/8

1 stop13h 52m

London Heathrow

Mon 30/9

Nonstop9h 45m

C$ 1,017

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 14/8

2 stops16h 55m

London Heathrow

Wed 28/8

2 stops30h 47m

C$ 1,030

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 5/8

1 stop21h 25m

London Heathrow

Sat 31/8

1 stop14h 30m

C$ 1,034

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 7/8

Nonstop9h 35m

London Heathrow

Thu 22/8

1 stop18h 05m

C$ 1,045

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sat 10/8

1 stop13h 20m

London Heathrow

Wed 21/8

1 stop15h 30m

C$ 1,150

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 16/7

1 stop12h 10m

London Heathrow

Thu 15/8

1 stop18h 16m

C$ 1,271

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 31/7

2 stops20h 30m

London Heathrow

Fri 16/8

2 stops21h 57m

C$ 1,284

Flights are sorted by cheapest first

Deals found on 16/5

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 10 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.
Search Deals

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 12 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.
Search Deals

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$ 564 while a round-trip flight costs C$ 1,095. Price data was last updated on 12 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$ 935). 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$ 763

February

C$ 829

March

C$ 929

April

C$ 911

May

C$ 949

June

C$ 1,057

July

C$ 1,274

August

C$ 1,098

September

C$ 985

October

C$ 913

November

C$ 898

December

C$ 975

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 18 May 2024.
To help decide which airline to fly from Seattle to London, see what other customers have to say about KLM, Air France and British Airways. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,647 reviews
Check prices

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

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
8.0
Very good
10,647 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

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
1,561 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

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
1,984 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

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.

Virgin Atlantic
7.7
Good
733 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

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
4,453 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Overall

8.0

Crew

8.6

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

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$ 1,100 on Cheapflights?

    Yes, there are multiple flights from Seattle to London Heathrow Airport for under C$ 1,100. The cheapest flight booked recently is on KLM for just C$ 1,012, but on average you can expect to pay C$ 1,035.

  • 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$ 983.

  • Are there last-minute flights available from Seattle to London Heathrow Airport for under C$ 1,400?

    There are currently 20+ open flights from Seattle to London Heathrow Airport within the next 7 days for less than C$ 1,400.

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

    Flying on KLM is currently your cheapest option to London Heathrow Airport, with prices starting at C$ 1,012. Additional round-trip tickets that might be worth considering are offered by Air France and British Airways, with the lowest prices starting at C$ 1,015 and C$ 1,017, respectively. Users have found that KLM is 15% 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$ 478 on Icelandair. Other airlines that offer cheap prices include WestJet from C$ 505 and KLM from C$ 617 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: American Airlines (71%), Aer Lingus (71%), Finnair (71%).

  • 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$ 2,660, our data shows the cheapest flight currently is C$ 711. When looking at the most popular route, (Seattle/Tacoma Intl - London Heathrow), you can expect to pay C$ 836 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 18/5.

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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.

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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 407,867 searches. Data last updated 18 May 2024.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 664AverageC$ 1,111FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapestC$ 700AverageC$ 1,071FlexibilityNo cancel feeOn-time77%
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IberiaCheapestC$ 742AverageC$ 1,065FlexibilityNo cancel feeOn-time77%
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FinnairCheapestC$ 822AverageC$ 950FlexibilityNo cancel feeOn-time76%
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Virgin AtlanticCheapestC$ 855AverageC$ 1,138FlexibilityNo cancel feeOn-time72%
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DeltaCheapestC$ 897AverageC$ 1,069FlexibilityNo cancel feeOn-timeN/A
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British AirwaysCheapestC$ 946AverageC$ 1,248FlexibilityNo 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 18 May 2024.
1%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
48%of flight departuresAfternoonNoon to 6 pm
51%of flight departuresEvening6 pm to midnight
Midnight
6 AM
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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 18 May 2024.
Sunday20daily flights
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights

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

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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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