Cheap flights from Seattle to London from £240

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1 adult
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Flight information for Seattle to London
(SEA to LON)

Find info about flight duration, direct flights, and airports for your flight from Seattle to London

Best price found

£240

Fastest flight time

9h 15m

Direct flights

None

Airports in London

6 airports
The best one-way flight to London from Seattle in the past 72 hours is £240. The best return flight deal from Seattle to London found on momondo in the last 72 hours is £447.
The fastest flight from Seattle to London takes 9h 15m
There are no direct flights from Seattle to London. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - London Heathrow Airport, Seattle/Tacoma Intl Airport - London Gatwick Airport and Seattle/Tacoma Intl Airport - London City Airport.
There are 6 airports near London: London City (LCY), London Heathrow (LHR), London Luton (LTN), London Stansted (STN), London Gatwick (LGW), London Southend (SEN)

How to get the cheapest flight ticket from Seattle to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

February

The cheapest time of year to fly to London from Seattle is February. The most expensive is June.

What is the cheapest day to depart Seattle for London?

Tuesday

The cheapest day of the week is usually Tuesday. The most expensive is usually Wednesday.

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

in the morning

Seattle to London flights are approximately 18% more expensive in the evening than in the morning

What is the cheapest airline that flies to London from Seattle?

KLM

British Airways, Finnair, and Icelandair are the most popular carriers operating from Seattle to London

What is the cheapest Seattle to London flight route?

Seattle/Tacoma Intl - London Stansted

Fly from Seattle/Tacoma Intl to London Stansted for the best Seattle - London flight prices

How far in advance should you book Seattle to London flights?

26 days before

The cheapest time to buy a flight from Seattle to London is approximately 26 days to departure

When travelling from Seattle to London, the most popular airport to fly into is London Heathrow Airport. The majority of travellers flying into London Heathrow Airport from Seattle are departing from Seattle/Tacoma Intl Airport. If you are looking for alternate airports to fly into when travelling from Seattle, you can try flying into London Gatwick Airport (in London), London City Airport (in London, or London Luton Airport (in 15). The cheapest route from Seattle to London is SEA — STN with an average price of £523 RT during the month of July.

Seattle/Tacoma Intl Airport (SEA) to London Heathrow Airport (LHR)£543
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Seattle/Tacoma Intl Airport (SEA) to London Gatwick Airport (LGW)£538
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Seattle/Tacoma Intl Airport (SEA) to London City Airport (LCY)£713
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Seattle/Tacoma Intl Airport (SEA) to London Luton Airport (LTN)£524
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Seattle/Tacoma Intl Airport (SEA) to London Stansted Airport (STN)£523
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Seattle/Tacoma Intl Airport (SEA) to London Southend Airport (SEN)£738
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Easily compare return flights from Seattle to London

Below you can see the best fares for your return flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Seattle to London by changing tabs
Multiple Airlines
19 Sep
SEA15:25Seattle/Tacoma Intl
13h 35m
1 stop
LGW05:00London Gatwick
11 Oct
LGW05:45London Gatwick
15h 55m
1 stop
SEA21:40Seattle/Tacoma Intl
Icelandair
8 Nov
SEA09:50Seattle/Tacoma Intl
11h 55m
1 stop
LGW21:45London Gatwick
12 Nov
LGW07:10London Gatwick
12h 45m
1 stop
SEA19:55Seattle/Tacoma Intl
Aer Lingus
22 Sep
SEA15:25Seattle/Tacoma Intl
13h 55m
1 stop
LHR05:20London Heathrow
20 Oct
LHR08:00London Heathrow
13h 40m
1 stop
SEA21:40Seattle/Tacoma Intl
Lufthansa
28 Sep
SEA10:20Seattle/Tacoma Intl
18h 05m
1 stop
LCY04:25London City
5 Oct
LCY05:15London City
15h 43m
2 stops
SEA20:58Seattle/Tacoma Intl
SWISS
23 Nov
SEA06:14Seattle/Tacoma Intl
38h 16m
2 stops
LCY20:30London City
30 Nov
LCY12:10London City
36h 06m
2 stops
SEA00:16Seattle/Tacoma Intl
KLM
9 Oct
SEA13:25Seattle/Tacoma Intl
15h 15m
1 stop
LCY04:40London City
26 Oct
LCY03:45London City
16h 10m
1 stop
SEA19:55Seattle/Tacoma Intl

Find the cheapest one-way flights from Seattle to London

If you're looking for one-way flights from Seattle to London, view some of our deals below provided by Icelandair and WestJet
Multiple Airlines
10 Oct
SEA17:45Seattle/Tacoma Intl
30h 45m
2 stops
STN00:30London Stansted
Icelandair
20 Sep
SEA11:55Seattle/Tacoma Intl
20h 25m
1 stop
LHR08:20London Heathrow
WestJet
26 Oct
SEA08:45Seattle/Tacoma Intl
15h 20m
1 stop
LHR00:05London Heathrow

Search last-minute flights to London from Seattle

Find and compare return flight prices for your last-minute flight from Seattle to London
Aer Lingus
11 Jul
SEA15:25Seattle/Tacoma Intl
13h 55m
1 stop
LHR05:20London Heathrow
1 Sep
LHR09:25London Heathrow
12h 15m
1 stop
SEA21:40Seattle/Tacoma Intl
Icelandair
11 Jul
SEA11:50Seattle/Tacoma Intl
12h 05m
1 stop
LHR23:55London Heathrow
31 Aug
LHR09:05London Heathrow
16h 10m
1 stop
SEA01:15Seattle/Tacoma Intl
Multiple Airlines
6 Jul
SEA02:00Seattle/Tacoma Intl
22h 45m
2 stops
LHR00:45London Heathrow
17 Jul
LHR03:45London Heathrow
17h 15m
1 stop
SEA21:00Seattle/Tacoma Intl
Scandinavian Airlines
9 Jul
SEA02:15Seattle/Tacoma Intl
22h 40m
2 stops
LHR00:55London Heathrow
29 Aug
LHR05:55London Heathrow
44h 21m
2 stops
SEA02:16Seattle/Tacoma Intl
Turkish Airlines
11 Jul
SEA13:45Seattle/Tacoma Intl
19h 00m
1 stop
LHR08:45London Heathrow
23 Sep
LHR02:45London Heathrow
17h 30m
1 stop
SEA20:15Seattle/Tacoma Intl
Icelandair
11 Jul
SEA15:05Seattle/Tacoma Intl
32h 45m
1 stop
LGW23:50London Gatwick
31 Aug
LGW09:05London Gatwick
16h 10m
1 stop
SEA01:15Seattle/Tacoma Intl

Best airlines flying from Seattle to London

Compare and see reviews for airlines that fly from Seattle to London with momondo
AirlineRatingFree CancellationPrice
KLMPriceFrom £402Free CancellationRating
7.7
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Norwegian Air UKPriceFrom £420Free CancellationRating
2.0
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IcelandairPriceFrom £515Free CancellationRating
7.3
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FinnairPriceFrom £600Free CancellationRating
7.6
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Virgin AtlanticPriceFrom £613Free CancellationRating
7.9
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British AirwaysPriceFrom £670Free CancellationRating
6.5
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  • Virgin Atlantic Flights From Seattle to London

    Virgin Atlantic flies from Seattle to London around 12 times per week, with 64 momondo users rating the airline 7.9/10. The cheapest Virgin Atlantic deal from Seattle to London in the last 72 hours was £744 (return), much lower than the average airfare cost of £1,000 for Virgin Atlantic flights on this route.

  • KLM Flights From Seattle to London

    Another popular option for Seattle to London flights is KLM (7.7/10, 133 ratings). KLM flies from Seattle to London around 12 times per week, with deals starting from £488 return and rising to an average price of around £676.


Icelandair flights from Seattle to London

Our best Icelandair deals on Seattle to London flight tickets
Icelandair
8 Nov
SEA09:50Seattle/Tacoma Intl
11h 55m
1 stop
LGW21:45London Gatwick
12 Nov
LGW07:10London Gatwick
12h 45m
1 stop
SEA19:55Seattle/Tacoma Intl
Icelandair
8 Nov
SEA09:50Seattle/Tacoma Intl
20h 30m
1 stop
LHR06:20London Heathrow
12 Nov
LHR07:05London Heathrow
12h 50m
1 stop
SEA19:55Seattle/Tacoma Intl
Icelandair
3 Oct
SEA11:50Seattle/Tacoma Intl
12h 00m
1 stop
LGW23:50London Gatwick
20 Oct
LGW09:05London Gatwick
12h 50m
1 stop
SEA21:55Seattle/Tacoma Intl

Aer Lingus flights from Seattle to London

Our best Aer Lingus deals on Seattle to London flight tickets
Aer Lingus
22 Sep
SEA15:25Seattle/Tacoma Intl
13h 55m
1 stop
LHR05:20London Heathrow
20 Oct
LHR08:00London Heathrow
13h 40m
1 stop
SEA21:40Seattle/Tacoma Intl
Aer Lingus
12 Sep
SEA15:25Seattle/Tacoma Intl
13h 15m
1 stop
LGW04:40London Gatwick
22 Sep
LGW05:25London Gatwick
16h 15m
1 stop
SEA21:40Seattle/Tacoma Intl
Aer Lingus
3 Oct
SEA15:25Seattle/Tacoma Intl
13h 15m
1 stop
LGW04:40London Gatwick
20 Oct
LGW05:25London Gatwick
16h 15m
1 stop
SEA21:40Seattle/Tacoma Intl

  • Are airlines flying from Seattle/Tacoma Intl to London offering flexible cancellation due to COVID-19?

    Due to the global impact of COVID-19, some of our airline partners operating flights from Seattle/Tacoma Intl to London, such as Virgin Atlantic, British Airways, and Icelandair may have flexible cancellation policies in place. Use our site to search for all of the airlines offering this flexibility to you.

  • How far is Seattle/Tacoma Intl to London by plane?

    London is 4781.3 mi away from Seattle/Tacoma Intl. Typically, this will take 11h 40m by plane in normal conditions.



Alternative routes for Seattle to London

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Seattle to Manchester Flights
Fastest flight time11h 55m
Cheapest price£612
Seattle to Birmingham Flights
Fastest flight time13h 10m
Cheapest price£659
Spokane to London Flights
Fastest flight time12h 40m
Cheapest price£620
Seattle to Newcastle upon Tyne Flights
Fastest flight time15h 10m
Cheapest price£906
Seattle to Liverpool Flights
Fastest flight time18h 25m
Cheapest price£762
Seattle to Southampton Flights
Fastest flight time14h 20m
Cheapest price£954
Seattle to Bristol Flights
Fastest flight time15h 10m
Cheapest price£748
Bellingham to London Flights
Fastest flight time15h 30m
Cheapest price£719
Spokane to Manchester Flights
Fastest flight time21h 55m
Cheapest price£738
Seattle to Leeds Flights
Fastest flight time15h 35m
Cheapest price£866
Pasco to London Flights
Fastest flight time13h 49m
Cheapest price£605
Seattle to Darlington Flights
Fastest flight time17h 00m
Cheapest price£836

Similar Seattle to London flights

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Why use momondo?

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