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Cheap flights from Seattle to London from C$ 413

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 14/8. 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 — LON
23 May — 30 May1
1 adult
Thu 23/5
Thu 30/5

The best prices from Seattle/Tacoma Intl to London are usually found in November or January, booked 7 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 18 May 2024.

Popular in

June

Cheapest in

November

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, 19% 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 25%.

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

To save up to 55% on this flight, we recommend booking at least 8 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$ 880 1-2 weeks out and tickets from C$ 1,579 for flights departing within the next 72 hours.

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

November is one of the best times of the year to fly to London 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 (SEA - LON)?

It’s optimal to fly from Seattle to London in the morning. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight at noon.

Cheap British Airways flights from Seattle to London

Explore cheap flight options specifically provided by British Airways 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 407,867 searches. Data last updated 18 May 2024.
Find some of the cheapest British Airways flights travelling from Seattle to London. Make sure to double check the flight details before booking.
Wed 14/810:08 a.m.SEA - LHR
1 stop13h 52mBritish Airways
Mon 30/94:00 p.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 16/5C$ 1,017
Sun 11/87:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 3/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 16/5C$ 1,035
Sun 11/87:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Mon 30/94:00 p.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 16/5C$ 1,103
Mon 12/81:30 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 3/109:45 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 16/5C$ 1,173
Fri 9/81:30 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Wed 21/84:00 p.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 17/5C$ 1,211
Mon 24/67:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Fri 30/89:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 17/5C$ 1,234
Fri 16/81:30 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Sat 5/109:50 a.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 16/5C$ 1,241
Mon 24/67:40 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Fri 30/84:00 p.m.LHR - SEA
Nonstop9h 45mBritish Airways
Deal found 18/5C$ 1,254
Mon 5/81:30 p.m.SEA - LHR
Nonstop9h 20mBritish Airways
Thu 22/87:40 a.m.LHR - SEA
1 stop17h 21mBritish Airways
Deal found 17/5C$ 1,298

  • One of the most popular airlines travelling from Seattle to London is British Airways. Flights from British Airways travelling this route typically cost C$ 784.79 RT. This price is typically 130% more expensive than other airlines that offer Seattle to London flights. When booking this route, the cheapest RT price found 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, British Airways flights are 8% more popular than any other airline flying that same route.

Cheap United Airlines flights from Seattle to London

Explore cheap flight options specifically provided by United Airlines 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 407,867 searches. Data last updated 18 May 2024.
To aid your search, here are some of the cheapest United Airlines flights we've found from Seattle to London. Deals are refreshing constantly so come back soon for more options.
Mon 5/812:30 a.m.SEA - LHR
1 stop21h 25mUnited Airlines
Sat 31/82:50 p.m.LHR - SEA
1 stop14h 30mUnited Airlines
Deal found 18/5C$ 1,034
Tue 21/57:25 a.m.SEA - LHR
2 stops18h 15mUnited Airlines
Tue 4/610:50 a.m.LHR - SEA
1 stop14h 09mUnited Airlines
Deal found 17/5C$ 1,039
Fri 16/812:30 a.m.SEA - LHR
1 stop21h 25mUnited Airlines
Fri 6/91:05 p.m.LHR - SEA
1 stop30h 54mUnited Airlines
Deal found 17/5C$ 1,041

  • One of the most popular airlines travelling from Seattle to London is United Airlines. Flights on this route from United Airlines typically cost C$ 697.47 RT, a price that is 148% more expensive than the average Seattle to London flight. The cheapest flight found was C$ 603 RT. 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, United Airlines flights are 4% more popular than any other airline flying that same route.

Cheap Seattle to London flights in May & June 2024

Find cheap flight options from Seattle to London 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.
The lowest fares we've come across on flights travelling from Seattle to London in May and June 2024. More deals are always being added, so be sure to check back regularly.
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 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 407,867 searches. Data last updated 18 May 2024.
The lowest fares we've come across on flights travelling from Seattle to London in May and June 2024. More deals are always being added, so be sure to check back regularly.
Tue 24/95:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Tue 8/1012:00 p.m.LGW - SEA
1 stop16h 21mMultiple Airlines
Deal found 17/5C$ 727
Tue 1/105:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Thu 24/1012:00 p.m.LGW - SEA
1 stop16h 21mMultiple Airlines
Deal found 17/5C$ 775
Tue 24/911:15 a.m.SEA - LGW
1 stop14h 45mVirgin Atlantic
Tue 1/1012:00 p.m.LGW - SEA
1 stop18h 20mVirgin Atlantic
Deal found 17/5C$ 808
Tue 1/1011:15 a.m.SEA - LGW
1 stop14h 45mVirgin Atlantic
Wed 16/1012:00 p.m.LGW - SEA
1 stop18h 20mVirgin Atlantic
Deal found 18/5C$ 809
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

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 407,867 searches. Data last updated 18 May 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.
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 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 407,867 searches. Data last updated 18 May 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 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 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 407,867 searches. Data last updated 18 May 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.
Wed 14/81:50 p.m.SEA - LGW
2 stops33h 35mMultiple Airlines
Deal found 18/5C$ 413
Tue 10/95:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Deal found 18/5C$ 425
Fri 6/95:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Deal found 17/5C$ 474
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
Thu 12/95:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Deal found 16/5C$ 496
Sat 9/117:25 a.m.SEA - LHR
2 stops21h 25mWestJet
Deal found 17/5C$ 505
Sat 17/85:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Deal found 17/5C$ 518
Wed 14/85:00 p.m.SEA - LGW
1 stop33h 55mMultiple Airlines
Deal found 18/5C$ 546

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

Fly from

Any airport

Fly to

Any airport

Budget

C$ 727 - C$ 1,034

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 24/9

1 stop33h 55m

London Gatwick

Tue 8/10

1 stop16h 21m

C$ 727

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 24/9

1 stop14h 45m

London Gatwick

Tue 1/10

1 stop18h 20m

C$ 808

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 24/9

2 stops20h 55m

London Gatwick

Wed 9/10

2 stops31h 41m

C$ 843

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 3/11

1 stop12h 20m

London Gatwick

Fri 15/11

1 stop13h 00m

C$ 857

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 1/10

1 stop18h 40m

London Gatwick

Wed 9/10

1 stop18h 20m

C$ 872

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 20/8

1 stop14h 45m

London Gatwick

Wed 4/9

1 stop18h 23m

C$ 915

Seattle/Tacoma IntlLondon Gatwick

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 21/9

1 stop14h 45m

London Gatwick

Mon 30/9

1 stop18h 20m

C$ 945

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

Mon 5/8

1 stop21h 25m

London Heathrow

Sat 31/8

1 stop14h 30m

C$ 1,034

Flights are sorted by cheapest first

Deals found on 17/5

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 10 May 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 7 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 12 May 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London flight should consider departing on Tuesday 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$ 482 while a round-trip flight costs C$ 891. 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 (average of C$ 560). Flying from Seattle to London 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 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 18 May 2024.
To help decide which airline to fly from Seattle to London, see what other customers have to say about British Airways, United Airlines and KLM. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,647 reviews
Check prices

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.0

Food

7.4

Boarding

8.2

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

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.0

Food

7.4

Boarding

8.2

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

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.0

Food

7.4

Boarding

8.2

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

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.0

Food

7.4

Boarding

8.2

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

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.0

Food

7.4

Boarding

8.2

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

Comfort

7.9

Crew

8.6

Entertainment

8.0

Overall

8.0

Food

7.4

Boarding

8.2

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 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 7 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$ 800 on Cheapflights?

    Yes, there are multiple flights from Seattle to London for under C$ 800. The cheapest flight booked recently is on Multiple Airlines for just C$ 727, but on average you can expect to pay C$ 849.

  • 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$ 983.

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

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

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

    According to our current data, Virgin Atlantic (C$ 808), SWISS (C$ 843), and Icelandair (C$ 857) offers the cheapest pricing from Seattle to London. These flights start at 31% lower than the current average price 3 months from now.

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

    C$ 478 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on WestJet and KLM, with prices starting from C$ 505 and C$ 617, respectively.

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

    Consider Air France, Finnair or British Airways 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 American Airlines (71%), Aer Lingus (71%) and Finnair (71%).

  • What are the cheapest flights from Seattle to London?

    Looking at all options, your cheapest flight can be booked for C$ 711. While the most popular route (Seattle/Tacoma Intl - London Heathrow) can be booked for C$ 836 on average our data indicates C$ 2,660 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 18/5.

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 7 airlines flying from Seattle to London

Discover the top 7 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 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%
Search Air France flights
IberiaCheapestC$ 742AverageC$ 1,065FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapestC$ 822AverageC$ 950FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapestC$ 855AverageC$ 1,138FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapestC$ 897AverageC$ 1,069FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
British AirwaysCheapestC$ 946AverageC$ 1,248FlexibilityNo 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 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
Noon
6 PM

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 18 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 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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