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Cheap flights from Seattle to London from £145

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to London departing on 14/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to London

Cheap return flights

These are some of the best return flight deals from Seattle to London that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Seattle to London.

Cheap last-minute flights

Planning a quick getaway from Seattle to London? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to London, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from Seattle to London

Find recent round-trip train or bus tickets from Seattle to London.

All round-trip flight deals to London

The cheapest plane tickets to London found on KAYAK recently.
10:13 - 10:35SEA-LGW
16h 22m1 stop
07:05 - 14:21LGW-SEA
39h 16m2 stops
Tue, 14 Jan - Mon, 10 Feb
10:13 - 10:35SEA-LGW
16h 22m1 stop
07:00 - 14:21LGW-SEA
39h 21m2 stops
Tue, 21 Jan - Thu, 30 Jan
14:35 - 10:55SEA-LGW
12h 20m1 stop
11:55 - 17:00LGW-SEA
13h 05m1 stop
£432Icelandair
Find Deal
Thu, 6 Feb - Wed, 12 Feb
18:55 - 14:40SEA-LGW
11h 45m1 stop
15:40 - 20:35LGW-SEA
12h 55m1 stop
£433Icelandair
Find Deal
Thu, 24 Apr - Tue, 29 Apr
17:45 - 11:10SEA-LHR
9h 25mdirect
06:20 - 11:20LHR-SEA
13h 00m1 stop
£502Virgin Atlantic
Find Deal
Sun, 29 Dec - Tue, 14 Jan
18:55 - 12:40SEA-LHR
9h 45mdirect
17:50 - 11:50LHR-SEA
26h 00m1 stop
£510KLM
Find Deal
Sun, 29 Dec - Tue, 14 Jan
18:50 - 12:15SEA-LHR
9h 25mdirect
08:20 - 19:02LHR-SEA
17h 42m1 stop
£515British Airways
Find Deal
Mon, 3 Mar - Tue, 18 Mar
19:50 - 12:15SEA-LHR
9h 25mdirect
09:25 - 12:20LHR-SEA
9h 55mdirect
£529British Airways
Find Deal
Sun, 16 Mar - Fri, 28 Mar
18:45 - 11:10SEA-LHR
9h 25mdirect
14:45 - 12:20LHR-SEA
28h 35m1 stop
£535Virgin Atlantic
Find Deal
Fri, 14 Mar - Mon, 24 Mar
09:15 - 07:05SEA-LHR
13h 50m1 stop
20:25 - 11:45LHR-SEA
23h 20m1 stop
£561KLM
Find Deal
Fri, 14 Feb - Thu, 20 Feb
10:13 - 10:35SEA-LGW
16h 22m1 stop
Tue, 14 Jan
10:13 - 10:35SEA-LGW
16h 22m1 stop
Tue, 14 Jan
14:35 - 10:55SEA-LGW
12h 20m1 stop
£169Icelandair
Find Deal
Sun, 16 Feb
14:35 - 19:30SEA-LHR
20h 55m1 stop
£169Icelandair
Find Deal
Sun, 19 Jan
15:15 - 12:50SEA-LHR
13h 35m1 stop
£177WestJet
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Tue, 21 Jan
14:09 - 16:35SEA-LCY
18h 26m1 stop
£356Virgin Atlantic
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Tue, 21 Jan
06:00 - 07:15SEA-LCY
17h 15m2 stops
£359Virgin Atlantic
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Sun, 16 Feb
18:50 - 12:15SEA-LHR
9h 25mdirect
£382British Airways
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Wed, 27 Nov
13:35 - 11:30SEA-LHR
13h 55m1 stop
£387British Airways
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Mon, 25 Nov
18:55 - 12:40SEA-LHR
9h 45mdirect
£434Air France
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Wed, 25 Dec
13:23 - 16:00SEA-LHR
18h 37m2 stops
06:40 - 21:30LHR-SEA
22h 50m2 stops
Mon, 25 Nov - Wed, 11 Dec
13:23 - 16:00SEA-LHR
18h 37m2 stops
06:40 - 22:15LHR-SEA
23h 35m2 stops
Mon, 25 Nov - Thu, 12 Dec
08:05 - 09:20SEA-LHR
17h 15m2 stops
06:40 - 21:30LHR-SEA
22h 50m2 stops
Sun, 24 Nov - Wed, 11 Dec
14:35 - 10:55SEA-LGW
12h 20m1 stop
11:55 - 17:00LGW-SEA
13h 05m1 stop
£637Icelandair
Find Deal
Mon, 25 Nov - Mon, 9 Dec
14:35 - 10:55SEA-LGW
12h 20m1 stop
11:55 - 20:00LGW-SEA
16h 05m2 stops
£779Icelandair
Find Deal
Mon, 25 Nov - Wed, 11 Dec
07:20 - 09:40SEA-LHR
18h 20m1 stop
15:00 - 16:55LHR-SEA
9h 55mdirect
£818British Airways
Find Deal
Thu, 21 Nov - Wed, 11 Dec
07:10 - 07:55SEA-LHR
16h 45m1 stop
15:50 - 18:30LHR-SEA
10h 40mdirect
£819Virgin Atlantic
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Sat, 23 Nov - Wed, 18 Dec
10:36 - 08:15SEA-LHR
13h 39m1 stop
14:10 - 23:15LHR-SEA
17h 05m1 stop
£826British Airways
Find Deal
Thu, 21 Nov - Thu, 12 Dec
19:25 - 13:10SEA-LHR
9h 45mdirect
06:20 - 11:20LHR-SEA
13h 00m1 stop
£893Air France
Find Deal
Fri, 22 Nov - Thu, 12 Dec
07:10 - 07:15SEA-LCY
16h 05m2 stops
18:55 - 11:52LCY-SEA
24h 57m1 stop
£1,902Virgin Atlantic
Find Deal
Thu, 21 Nov - Tue, 3 Dec
13:35 - 07:00SEA-LHR
9h 25mdirect
15:00 - 16:55LHR-SEA
9h 55mdirect
£508British Airways
Find Deal
Tue, 21 Jan - Thu, 30 Jan
13:30 - 06:50SEA-LHR
9h 20mdirect
16:00 - 17:45LHR-SEA
9h 45mdirect
£509British Airways
Find Deal
Wed, 23 Apr - Wed, 7 May
17:45 - 11:10SEA-LHR
9h 25mdirect
13:15 - 15:15LHR-SEA
10h 00mdirect
£510Virgin Atlantic
Find Deal
Sun, 29 Dec - Tue, 14 Jan
17:45 - 11:10SEA-LHR
9h 25mdirect
13:15 - 15:15LHR-SEA
10h 00mdirect
£511Virgin Atlantic
Find Deal
Sun, 29 Dec - Tue, 14 Jan
17:45 - 11:10SEA-LHR
9h 25mdirect
13:15 - 15:15LHR-SEA
10h 00mdirect
£528Delta
Find Deal
Wed, 8 Jan - Tue, 21 Jan
17:45 - 11:10SEA-LHR
9h 25mdirect
13:05 - 15:05LHR-SEA
10h 00mdirect
£607Delta
Find Deal
Thu, 9 Jan - Sat, 25 Jan
19:55 - 13:30SEA-LHR
9h 35mdirect
17:00 - 19:35LHR-SEA
10h 35mdirect
£612Air France
Find Deal
Wed, 9 Apr - Thu, 15 May
19:00 - 12:40SEA-LHR
9h 40mdirect
15:50 - 18:25LHR-SEA
10h 35mdirect
£697KLM
Find Deal
Wed, 1 Jan - Wed, 8 Jan
19:55 - 13:30SEA-LHR
9h 35mdirect
17:00 - 19:35LHR-SEA
10h 35mdirect
£699KLM
Find Deal
Fri, 11 Apr - Sat, 19 Apr
19:30 - 13:10SEA-LHR
9h 40mdirect
15:50 - 18:25LHR-SEA
10h 35mdirect
£754Air France
Find Deal
Fri, 3 Jan - Fri, 10 Jan

Finnair flights from Seattle to London

Our best Finnair deals on Seattle to London flight tickets
Finnair
7 Apr
SEA19:40Seattle/Tacoma Intl
9h 20m
LHR13:00London Heathrow
15 May
LHR10:20London Heathrow
13h 40m
1 stop
SEA16:00Seattle/Tacoma Intl
Finnair
20 Apr
SEA13:32Seattle/Tacoma Intl
12h 48m
1 stop
LHR10:20London Heathrow
7 May
LHR09:30London Heathrow
14h 30m
1 stop
SEA16:00Seattle/Tacoma Intl
Finnair
20 Apr
SEA13:32Seattle/Tacoma Intl
12h 48m
1 stop
LHR10:20London Heathrow
4 May
LHR10:20London Heathrow
13h 40m
1 stop
SEA16:00Seattle/Tacoma Intl

KLM flights from Seattle to London

Our best KLM deals on Seattle to London flight tickets
KLM
29 Dec
SEA18:55Seattle/Tacoma Intl
9h 45m
LHR12:40London Heathrow
14 Jan
LHR17:50London Heathrow
26h 00m
1 stop
SEA11:50Seattle/Tacoma Intl
KLM
14 Feb
SEA09:15Seattle/Tacoma Intl
13h 50m
1 stop
LHR07:05London Heathrow
20 Feb
LHR20:25London Heathrow
23h 20m
1 stop
SEA11:45Seattle/Tacoma Intl
KLM
25 Nov
SEA13:35Seattle/Tacoma Intl
12h 25m
1 stop
LHR10:00London Heathrow
25 Dec
LHR06:30London Heathrow
13h 22m
1 stop
SEA11:52Seattle/Tacoma Intl

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 typical price of a round-trip flight between Seattle and London?

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

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

What is the cheapest day to depart Seattle for London?

Monday. The cheapest day of the week is usually Monday. The most expensive is usually Friday.

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

In the evening. Seattle to London flights are approximately 27% more expensive in the morning than in the evening

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

Icelandair. Icelandair, Air France, and Virgin Atlantic are the most popular carriers operating from Seattle to London

What is the cheapest Seattle to London flight route?

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

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

7 days before. The cheapest time to buy a flight from Seattle to London is approximately 7 days to departure

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

As of November 2024, 11 flights take off from Seattle and land in London each day. The most common flight departure time for this route is 17:00, with 50% of daily flights taking off in the afternoon.

How many flights depart from Seattle to London on average per week?

78 flights are operational weekly from Seattle to London as of November 2024. The most popular departure day for this route is Tue, with 23% of flights per week taking off on this day.

What cabin class options are available on Seattle to London flights?

There are 3 cabin classes available to choose from on Seattle to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to London flights?

You could potentially save up to 54% on your flight if you consider stops on a Seattle to London flight.

How have Seattle to London flight prices changed over time?

As of November 2024, prices for Seattle to London flights are approximately 30% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to London

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to London according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Seattle to London (SEA to LON) flight deals and tips

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

Best price found

£145

Fastest flight time

9h 20m

Direct flights

Every day

Airports in London

4 airports
The best one-way flight to London from Seattle in the past 72 hours is £145. The best return flight deal from Seattle to London found on momondo in the last 72 hours is £409.
The fastest flight from Seattle to London takes 9h 20m
Direct flights go from Seattle to London every day.
There are 4 airports near London: London City (LCY), London Heathrow (LHR), London Stansted (STN), London Gatwick (LGW)

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

    London is 4781.3 mi away from Seattle/Tacoma Intl. Typically, this will take 9h 20m by plane in normal conditions.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to London?

    Prices for flights from Seattle/Tacoma Intl Airport to London were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to London?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to London?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London.

  • What documentation or ID do you need to fly to London?

    The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Seattle to London?

  • What is the most popular airline from Seattle to London?


Best airlines flying from Seattle to London

Compare and see reviews for airlines that fly from Seattle to London with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £394Free CancellationRating
7.2
555 reviews
Search Icelandair flights
Air FrancePriceFrom £468Free CancellationRating
7.4
1,528 reviews
Search Air France flights
Virgin AtlanticPriceFrom £474Free CancellationRating
7.5
663 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £488Free CancellationRating
6.6
6,839 reviews
Search British Airways flights
  • Virgin Atlantic Flights From Seattle to London

    Virgin Atlantic flies from Seattle to London around 9 times per week, with 663 momondo users rating the airline 7.5/10. The cheapest Virgin Atlantic deal from Seattle to London in the last 72 hours was £601 (round-trip), much lower than the average airfare cost of £845 for Virgin Atlantic flights on this route.

  • Air France Flights From Seattle to London

    Another popular option for Seattle to London flights is Air France (7.4/10, 1,528 ratings). Air France flies from Seattle to London around 9 times per week, with deals starting from £593 round-trip and rising to an average price of around £767.


Why use momondo?

Why should I use momondo to find a flight deal from Seattle to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to London . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to London with flexible booking policies on momondo?

Flights from Seattle to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to London?

Once all potential Seattle to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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