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Cheap flights from Seattle to London from C$ 447

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 12/7. 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 — LON
1 May — 8 May1
1 adult
Wed 1/5
Wed 8/5

The best prices from Seattle/Tacoma Intl to London are usually found in January or February, booked 58 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Seattle to London

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to London (LON). 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 26 April 2024.

Popular in

June

Cheapest in

January

Round-trip from

C$ 758

One-way from

C$ 534
High demand for flights, 24% potential price rise
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Best time to find cheap flights, 22% potential price drop
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From Seattle/Tacoma Intl to London (LON)
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One-way flight from Seattle/Tacoma Intl to London (LON)
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What is the cheapest day to fly round-trip from Seattle to London?

Tuesday is generally a great day to depart. Flying on this day could help you save up to 32%.

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

To save up to 39% on this flight, we recommend booking at least 59 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Seattle to London from C$ 1,185 1-2 weeks out and tickets from C$ 1,565 for flights departing within the next 72 hours.

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

January is one of the best times of the year to fly to London from Seattle. Prices for January average C$ 1,177 per person but you can even find prices for as low as C$ 632. The most expensive prices can be found in the month of June. Opting for a January flight can save you 32% on your journey compared to booking in June

When is the cheapest time to fly from Seattle to London (SEA - LON)?

It’s optimal to fly from Seattle to London in the afternoon. By choosing this option you can save up to 12% on the cost of your flight, compared to a flight in the morning.

Cheap KLM flights from Seattle to London

Explore cheap flight options specifically provided by KLM for the route between Seattle and London. 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 508,915 searches. Data last updated 26 April 2024.
Find some of the cheapest KLM flights travelling from Seattle to London. Make sure to double check the flight details before booking.
Thu 25/79:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Wed 30/104:35 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 25/4C$ 1,074
Wed 8/59:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Wed 15/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 25/4C$ 1,093
Tue 30/47:30 p.m.SEA - LHR
Nonstop9h 45mKLM
Fri 17/511:45 a.m.LHR - SEA
1 stop12h 55mKLM
Deal found 25/4C$ 1,099
Tue 30/47:30 p.m.SEA - LHR
Nonstop9h 45mKLM
Fri 17/511:45 a.m.LHR - SEA
1 stop12h 55mKLM
Deal found 26/4C$ 1,100
Tue 30/47:30 p.m.SEA - LHR
Nonstop9h 45mKLM
Fri 17/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 26/4C$ 1,105
Fri 10/59:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Mon 20/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 25/4C$ 1,230
Thu 16/59:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Sun 19/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 26/4C$ 1,231
Tue 18/69:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Tue 10/94:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 25/4C$ 1,261
Tue 7/59:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Fri 17/511:45 a.m.LHR - SEA
1 stop12h 55mKLM
Deal found 25/4C$ 1,281

  • KLM is one of the most popular airlines used for those travelling from Seattle to London. Seattle to London flights are typically 137% 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 is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London is London Heathrow Airport. When flying from Seattle to London, KLM flights are 8% more popular than any other airline flying that same route.

Cheap Virgin Atlantic flights from Seattle to London

Explore cheap flight options specifically provided by Virgin Atlantic for the route between Seattle and London. 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 508,915 searches. Data last updated 26 April 2024.
To aid your search, here are some of the cheapest Virgin Atlantic flights we've found from Seattle to London. Deals are refreshing constantly so come back soon for more options.
Tue 1/1011:15 a.m.SEA - LGW
1 stop14h 45mVirgin Atlantic
Tue 22/1012:00 p.m.LGW - SEA
1 stop18h 20mVirgin Atlantic
Deal found 24/4C$ 863
Tue 1/1011:15 a.m.SEA - LGW
1 stop14h 45mVirgin Atlantic
Wed 9/1012:00 p.m.LGW - SEA
1 stop18h 20mVirgin Atlantic
Deal found 26/4C$ 865
Wed 25/911:15 a.m.SEA - LGW
1 stop14h 45mVirgin Atlantic
Sat 5/1012:00 p.m.LGW - SEA
1 stop18h 20mVirgin Atlantic
Deal found 24/4C$ 932
Thu 25/79:15 p.m.SEA - LHR
Nonstop9h 35mVirgin Atlantic
Wed 30/108:25 p.m.LHR - SEA
1 stop21h 50mVirgin Atlantic
Deal found 25/4C$ 1,067
Thu 2/511:43 a.m.SEA - LGW
1 stop14h 17mVirgin Atlantic
Thu 9/512:00 p.m.LGW - SEA
1 stop18h 18mVirgin Atlantic
Deal found 25/4C$ 1,144
Thu 2/54:30 p.m.SEA - LHR
Nonstop9h 20mVirgin Atlantic
Thu 9/56:15 a.m.LHR - SEA
1 stop13h 05mVirgin Atlantic
Deal found 25/4C$ 1,163
Thu 2/54:30 p.m.SEA - LHR
Nonstop9h 20mVirgin Atlantic
Tue 7/56:15 a.m.LHR - SEA
1 stop13h 05mVirgin Atlantic
Deal found 25/4C$ 1,322

  • Virgin Atlantic is one of the most popular airlines used for those travelling from Seattle to London. Seattle to London flights are typically 124% cheaper than other airlines traveling the same route. Flights from Virgin Atlantic typically cost C$ 697.47 RT. The cheapest Virgin Atlantic 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. London Heathrow Airport is the most popular arrival airport in London. When flying from Seattle to London, Virgin Atlantic flights are 4% more popular than any other airline flying that same route.

Cheap Seattle to London flights in April & May 2024

Find cheap flight options from Seattle to London specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 508,915 searches. Prices were last updated on 26 April 2024.
The lowest fares we've come across on flights travelling from Seattle to London in April and May 2024. More deals are always being added, so be sure to check back regularly.
Tue 14/56:55 p.m.SEA - LHR
1 stop17h 25mIcelandair
Sat 18/51:05 p.m.LHR - SEA
1 stop12h 35mIcelandair
Deal found 25/4C$ 993
Sat 4/51:30 p.m.SEA - LHR
2 stops18h 30mMultiple Airlines
Mon 6/56:40 a.m.LHR - SEA
2 stops23h 44mMultiple Airlines
Deal found 25/4C$ 1,034
Fri 10/56:55 p.m.SEA - LHR
1 stop17h 25mIcelandair
Fri 17/51:05 p.m.LHR - SEA
1 stop15h 30mIcelandair
Deal found 25/4C$ 1,062
Sun 28/411:43 a.m.SEA - LGW
1 stop14h 17mVirgin Atlantic
Tue 14/512:00 p.m.LGW - SEA
1 stop18h 18mVirgin Atlantic
Deal found 25/4C$ 1,075
Sun 28/411:43 a.m.SEA - LGW
1 stop14h 17mVirgin Atlantic
Tue 14/512:00 p.m.LGW - SEA
1 stop18h 18mVirgin Atlantic
Deal found 26/4C$ 1,077
Sun 28/411:43 a.m.SEA - LGW
1 stop14h 17mDelta
Tue 14/512:00 p.m.LGW - SEA
2 stops18h 25mDelta
Deal found 25/4C$ 1,082
Sun 28/47:20 a.m.SEA - LGW
1 stop18h 40mDelta
Tue 14/512:00 p.m.LGW - SEA
2 stops18h 25mDelta
Deal found 26/4C$ 1,084
Tue 14/59:10 p.m.SEA - LHR
Nonstop9h 40mDelta
Tue 21/511:30 a.m.LHR - SEA
1 stop14h 10mDelta
Deal found 25/4C$ 1,084
Sun 12/54:30 p.m.SEA - LHR
Nonstop9h 20mDelta
Tue 21/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 25/4C$ 1,085

Seattle to London 2024 flight deals

Discover exclusive flight deals for travel between Seattle and London in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 508,915 searches. Data last updated 26 April 2024.
The lowest fares we've come across on flights travelling from Seattle to London in April and May 2024. More deals are always being added, so be sure to check back regularly.
Thu 14/112:35 p.m.SEA - LGW
1 stop12h 20mMultiple Airlines
Tue 19/1112:00 p.m.LGW - SEA
1 stop15h 01mMultiple Airlines
Deal found 25/4C$ 844
Tue 22/105:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Tue 29/1012:00 p.m.LGW - SEA
1 stop27h 45mMultiple Airlines
Deal found 26/4C$ 855
Sun 13/103:50 p.m.SEA - LGW
1 stop11h 55mIcelandair
Thu 31/1012:00 p.m.LGW - SEA
1 stop13h 00mIcelandair
Deal found 25/4C$ 858
Tue 19/112:35 p.m.SEA - LGW
1 stop12h 20mIcelandair
Fri 29/1112:00 p.m.LGW - SEA
1 stop13h 00mIcelandair
Deal found 26/4C$ 859
Mon 30/93:50 p.m.SEA - LHR
1 stop12h 05mIcelandair
Fri 4/101:05 p.m.LHR - SEA
1 stop12h 50mIcelandair
Deal found 25/4C$ 861
Mon 30/93:50 p.m.SEA - LHR
1 stop12h 05mIcelandair
Wed 23/101:05 p.m.LHR - SEA
1 stop12h 50mIcelandair
Deal found 26/4C$ 862
Tue 1/1011:15 a.m.SEA - LGW
1 stop14h 45mVirgin Atlantic
Tue 22/1012:00 p.m.LGW - SEA
1 stop18h 20mVirgin Atlantic
Deal found 24/4C$ 863
Tue 1/1011:15 a.m.SEA - LGW
1 stop14h 45mVirgin Atlantic
Wed 9/1012:00 p.m.LGW - SEA
1 stop18h 20mVirgin Atlantic
Deal found 26/4C$ 865
Sun 29/93:50 p.m.SEA - LHR
1 stop12h 05mIcelandair
Fri 4/101:05 p.m.LHR - SEA
1 stop12h 50mIcelandair
Deal found 25/4C$ 869

Direct flights to London from Seattle

Discover non-stop flight options from Seattle to London. 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 508,915 searches. Data last updated 26 April 2024.
For a shorter flight, select one of these non-stop flights from Seattle to London. Select from other flights from Seattle to London by using the search form above.
Tue 1/109:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Fri 25/104:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 24/4C$ 892
Tue 1/107:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Fri 18/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 26/4C$ 893
Sat 28/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Tue 15/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 25/4C$ 960
Sat 5/107:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Tue 15/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 26/4C$ 962
Sun 29/97:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Sun 13/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 25/4C$ 973
Fri 4/101:30 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Tue 22/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 26/4C$ 974
Mon 12/89:15 p.m.SEA - LHR
Nonstop9h 35mDelta
Wed 28/812:45 p.m.LHR - SEA
Nonstop9h 55mDelta
Deal found 25/4C$ 985
Tue 20/89:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Tue 27/84:50 p.m.LHR - SEA
Nonstop10h 25mKLM
Deal found 26/4C$ 986
Mon 26/89:15 p.m.SEA - LHR
Nonstop9h 35mDelta
Wed 4/94:50 p.m.LHR - SEA
Nonstop10h 30mDelta
Deal found 25/4C$ 1,006

Seattle to London flights leaving soon

Find last-minute flight options from Seattle to London 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 508,915 searches. Data last updated 26 April 2024.
Users seeking a last-minute flight from Seattle to London should consider booking one of these fares. To prevent any unwanted surprises, users should verify their flight info before booking.
Sat 4/51:30 p.m.SEA - LHR
2 stops18h 30mMultiple Airlines
Mon 6/56:40 a.m.LHR - SEA
2 stops23h 44mMultiple Airlines
Deal found 25/4C$ 1,034
Fri 10/56:55 p.m.SEA - LHR
1 stop17h 25mIcelandair
Fri 17/51:05 p.m.LHR - SEA
1 stop15h 30mIcelandair
Deal found 25/4C$ 1,062
Wed 8/59:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Wed 15/54:50 p.m.LHR - SEA
Nonstop10h 30mKLM
Deal found 25/4C$ 1,093
Sun 28/44:30 p.m.SEA - LHR
Nonstop9h 20mDelta
Tue 7/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 25/4C$ 1,096
Sun 28/44:30 p.m.SEA - LHR
Nonstop9h 20mDelta
Tue 14/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 26/4C$ 1,097
Tue 30/47:30 p.m.SEA - LHR
Nonstop9h 45mKLM
Fri 17/511:45 a.m.LHR - SEA
1 stop12h 55mKLM
Deal found 25/4C$ 1,099
Tue 30/47:30 p.m.SEA - LHR
Nonstop9h 45mKLM
Fri 17/511:45 a.m.LHR - SEA
1 stop12h 55mKLM
Deal found 26/4C$ 1,100
Mon 29/412:35 a.m.SEA - LHR
1 stop22h 40mDelta
Wed 8/59:00 a.m.LHR - SEA
1 stop16h 40mDelta
Deal found 25/4C$ 1,101
Sat 27/411:06 p.m.SEA - LHR
1 stop13h 04mDelta
Tue 7/56:15 a.m.LHR - SEA
1 stop13h 05mDelta
Deal found 25/4C$ 1,103

One-way flights to London from Seattle

Search for one-way flight options from Seattle to London. 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 508,915 searches. Data last updated 26 April 2024.
Users in need of a one-way flight from Seattle to London can choose from these deals. Those seeking round-trip flights from Seattle to London should utilize the search form at the top of the page.
Fri 12/75:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Deal found 25/4C$ 447
Fri 6/95:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Deal found 25/4C$ 534
Sat 24/811:00 p.m.SEA - LHR
1 stop13h 20mIcelandair
Deal found 25/4C$ 555
Tue 8/109:10 p.m.SEA - LHR
Nonstop9h 40mKLM
Deal found 26/4C$ 647
Tue 8/109:25 a.m.SEA - LGW
2 stops16h 35mVirgin Atlantic
Deal found 26/4C$ 653
Mon 7/1012:35 a.m.SEA - LHR
1 stop22h 40mDelta
Deal found 26/4C$ 653
Fri 21/67:00 a.m.SEA - LGW
2 stops18h 00mWestJet
Deal found 26/4C$ 657
Wed 25/92:08 p.m.SEA - LGW
2 stops19h 47mSWISS
Deal found 25/4C$ 677
Thu 19/99:15 p.m.SEA - LHR
Nonstop9h 35mKLM
Deal found 25/4C$ 716

Find flights from Seattle to London within your budget

Customize your flight search to find flights from Seattle to London 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 508,915 searches. Data last updated 26 April 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 855 - C$ 1,118

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 22/10

1 stop33h 55m

London Gatwick

Tue 29/10

1 stop27h 45m

C$ 855

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 13/10

1 stop11h 55m

London Gatwick

Thu 31/10

1 stop13h 00m

C$ 858

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 1/10

1 stop14h 45m

London Gatwick

Tue 22/10

1 stop18h 20m

C$ 863

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 1/10

2 stops20h 40m

London Gatwick

Mon 21/10

2 stops31h 41m

C$ 892

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 1/10

1 stop18h 40m

London Gatwick

Fri 25/10

1 stop18h 20m

C$ 928

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 13/8

1 stop14h 45m

London Gatwick

Tue 27/8

1 stop18h 23m

C$ 956

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Thu 25/7

Nonstop9h 35m

London Heathrow

Wed 30/10

Nonstop10h 25m

C$ 1,074

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 14/5

1 stop34h 10m

London Gatwick

Tue 21/5

1 stop31h 30m

C$ 1,093

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Wed 1/5

2 stops15h 51m

London Heathrow

Tue 14/5

1 stop13h 55m

C$ 1,118

Flights are sorted by cheapest first

Deals found on 26/4

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to London. Price data was last updated on 28 January 2024.
The price you pay for your flight from Seattle to London may vary depending on when you book. For the best chance of a lower fare, look to book 58 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time to fly from Seattle to London?

Use this chart to determine the cheapest time to fly round-trip from Seattle to London. Price data was last updated on 21 April 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday 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 London by month

Plan your trip from Seattle to London by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to London is currently C$ 615 while a round-trip flight costs C$ 960. Price data was last updated on 21 April 2024.

Currently, January is the cheapest month in which you can book a flight from Seattle to London (average of C$ 560). Flying from Seattle to London in July is currently the most expensive (average of C$ 941). 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$ 766

February

C$ 837

March

C$ 929

April

C$ 915

May

C$ 993

June

C$ 1,104

July

C$ 1,287

August

C$ 1,114

September

C$ 991

October

C$ 918

November

C$ 902

December

C$ 986

Temperature and rainfall in London by month

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

LON

Temperature

4 - 17 °C

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 26 April 2024.
To help decide which airline to fly from Seattle to London, see what other customers have to say about KLM, Virgin Atlantic and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,966 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Delta
8.1
Very good
10,966 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

KLM
7.9
Good
1,626 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

SWISS
7.8
Good
2,061 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Finnair
7.8
Good
1,385 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Virgin Atlantic
7.7
Good
746 reviews
Delta
8.1
Very good
10,966 reviews
Check prices

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.1

Food

7.4

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Related info for your journey

Find useful and relevant information for your journey from Seattle to London. 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?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to London. On average, Seattle/Tacoma Intl has 19 outbound flights to London per day from 6 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

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

    Yes, there are multiple flights from Seattle to London for under C$ 900. The cheapest flight booked recently is on Multiple Airlines for just C$ 855, but on average you can expect to pay C$ 937.

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

    Cheapflights has 20 direct flights from Seattle to London under C$ 900. A good price for a direct flight from Seattle to London is less than C$ 1,000.

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

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

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

    According to our current data, Icelandair (C$ 858), Virgin Atlantic (C$ 863), and SWISS (C$ 892) offers the cheapest pricing from Seattle to London. These flights start at 27% lower than the current average price 3 months from now.

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

    C$ 555 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on KLM and Virgin Atlantic, with prices starting from C$ 647 and C$ 653, respectively.

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

    Consider Finnair, British Airways or Delta when booking your flight. These represent the most popular airlines when flying from Seattle to London.

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

    The top 3 most reliable airlines when flying from Seattle to London are Air France (78%), Delta (78%) and KLM (78%).

  • What are the cheapest flights from Seattle to London?

    Looking at all options, your cheapest flight can be booked for C$ 648. While the most popular route (Seattle/Tacoma Intl - London Heathrow) can be booked for C$ 917 on average our data indicates C$ 1,018 when flying from Seattle to London.

  • What does SEA to LHR mean?

    SEA and LHR are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. SEA to LHR refers to a flight route from Seattle/Tacoma Intl Airport to London Heathrow Airport. London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN) are other airports near this flight route and their unique identifiers/IATA codes.

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

    The amount of baggage you can bring on your Seattle to London 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 London with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to London 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 London that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to London 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 London that allow pets onboard?

    Many airlines flying from Seattle to London 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 London?

    Yes, you can often find last-minute deals on Seattle to London 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 flight deals updated?

    The Seattle to London flight deals you see on this page were last updated on 26/4.

See more FAQs

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

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Top 6 airlines flying from Seattle to London

Discover the top 6 airlines that operate flights from Seattle to London. 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 508,915 searches. Data last updated 26 April 2024.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 667AverageC$ 1,116FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapestC$ 745AverageC$ 1,070FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapestC$ 825AverageC$ 954FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapestC$ 855AverageC$ 1,201FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapestC$ 901AverageC$ 1,074FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
British AirwaysCheapestC$ 955AverageC$ 1,311FlexibilityNo cancel feeOn-time70%
Search British Airways flights
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Search flights from Seattle to London by cabin class

Find flights from Seattle to London, 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 London

Find hourly flight availability from Seattle to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 26 April 2024.
0%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
40%of flight departuresAfternoonNoon to 6 pm
60%of flight departuresEvening6 pm to midnight
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Weekly flight availability from Seattle to London

Explore weekly flight availability from Seattle to London. 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 26 April 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 London?

Cheapflights helps you search for flights from Seattle to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Seattle to London for you. Better yet — we are completely free to use.

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

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

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

Yes! Start tracking prices for Seattle to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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