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Cheap flights from Seattle to London from £173

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 5/2. 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.
14:35 - 10:55SEA-LGW
12h 20m1 stop
11:55 - 17:00LGW-SEA
13h 05m1 stop
£463Icelandair
Find Deal
Mon, 2 Dec - Tue, 10 Dec
15:50 - 11:55SEA-LHR
12h 05m1 stop
13:05 - 17:40LHR-SEA
12h 35m1 stop
£463Icelandair
Find Deal
Mon, 7 Apr - Wed, 14 May
17:05 - 10:30SEA-LHR
9h 25mdirect
13:15 - 15:15LHR-SEA
10h 00mdirect
£493Virgin Atlantic
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Mon, 2 Dec - Tue, 10 Dec
18:50 - 12:15SEA-LHR
9h 25mdirect
09:25 - 11:20LHR-SEA
9h 55mdirect
£498British Airways
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Tue, 14 Jan - Tue, 21 Jan
17:05 - 10:30SEA-LHR
9h 25mdirect
06:30 - 11:52LHR-SEA
13h 22m1 stop
£502Delta
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Tue, 3 Dec - Wed, 11 Dec
17:05 - 10:30SEA-LHR
9h 25mdirect
13:15 - 15:15LHR-SEA
10h 00mdirect
£504Virgin Atlantic
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Mon, 2 Dec - Tue, 10 Dec
19:00 - 12:40SEA-LHR
9h 40mdirect
06:30 - 11:50LHR-SEA
13h 20m1 stop
£509Delta
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Sun, 12 Jan - Wed, 22 Jan
19:55 - 13:30SEA-LHR
9h 35mdirect
17:00 - 19:35LHR-SEA
10h 35mdirect
£521KLM
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Tue, 8 Apr - Thu, 15 May
18:50 - 12:15SEA-LHR
9h 25mdirect
15:00 - 16:55LHR-SEA
9h 55mdirect
£535British Airways
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Tue, 7 Jan - Mon, 20 Jan
18:55 - 12:40SEA-LHR
9h 45mdirect
15:50 - 18:30LHR-SEA
10h 40mdirect
£550KLM
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Sun, 1 Dec - Sun, 8 Dec
14:35 - 10:55SEA-LGW
12h 20m1 stop
£173Icelandair
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Wed, 5 Feb
15:15 - 12:50SEA-LHR
13h 35m1 stop
£173WestJet
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Thu, 30 Jan
17:05 - 10:30SEA-LHR
9h 25mdirect
£303Virgin Atlantic
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Mon, 2 Dec
18:50 - 12:15SEA-LHR
9h 25mdirect
£313British Airways
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Tue, 31 Dec
18:55 - 12:40SEA-LHR
9h 45mdirect
£316KLM
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Sun, 1 Dec
06:15 - 07:55SEA-LHR
17h 40m1 stop
£319Delta
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Wed, 1 Jan
14:09 - 16:35SEA-LCY
18h 26m1 stop
£340Virgin Atlantic
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Tue, 7 Jan
13:45 - 07:10SEA-LHR
9h 25mdirect
£345British Airways
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Fri, 3 Jan
19:25 - 13:10SEA-LHR
9h 45mdirect
£354KLM
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Fri, 29 Nov
00:40 - 07:05SEA-LHR
23h 25m1 stop
£356Delta
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Tue, 18 Mar
20:00 - 17:50SEA-LHR
13h 50m1 stop
08:50 - 18:15LHR-SEA
17h 25m1 stop
£552Aer Lingus
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Wed, 6 Nov - Sun, 17 Nov
19:00 - 21:30SEA-LGW
18h 30m1 stop
10:15 - 17:05LGW-SEA
38h 50m1 stop
£573Turkish Airlines
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Tue, 5 Nov - Tue, 12 Nov
19:00 - 12:40SEA-LHR
9h 40mdirect
06:30 - 11:40LHR-SEA
13h 10m1 stop
£621Delta
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Sun, 3 Nov - Thu, 14 Nov
17:45 - 11:10SEA-LHR
9h 25mdirect
15:50 - 18:15LHR-SEA
10h 25mdirect
£631Delta
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Sun, 3 Nov - Wed, 13 Nov
13:30 - 10:00SEA-LHR
12h 30m1 stop
15:50 - 18:15LHR-SEA
10h 25mdirect
£635KLM
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Mon, 4 Nov - Wed, 13 Nov
19:00 - 12:40SEA-LHR
9h 40mdirect
15:50 - 18:15LHR-SEA
10h 25mdirect
£669KLM
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Sun, 3 Nov - Sun, 10 Nov
10:36 - 08:15SEA-LHR
13h 39m1 stop
09:25 - 11:20LHR-SEA
9h 55mdirect
£673British Airways
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Thu, 7 Nov - Tue, 19 Nov
13:35 - 07:00SEA-LHR
9h 25mdirect
09:25 - 11:20LHR-SEA
9h 55mdirect
£692British Airways
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Tue, 5 Nov - Tue, 12 Nov
14:35 - 10:55SEA-LGW
12h 20m1 stop
11:55 - 17:00LGW-SEA
13h 05m1 stop
£821Icelandair
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Tue, 5 Nov - Fri, 8 Nov
11:27 - 10:55SEA-LGW
15h 28m2 stops
11:55 - 09:06LGW-SEA
29h 11m2 stops
£854Icelandair
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Tue, 5 Nov - Mon, 18 Nov
17:05 - 10:30SEA-LHR
9h 25mdirect
13:15 - 15:15LHR-SEA
10h 00mdirect
£454Virgin Atlantic
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Mon, 2 Dec - Tue, 10 Dec
18:50 - 12:15SEA-LHR
9h 25mdirect
09:25 - 12:20LHR-SEA
9h 55mdirect
£461British Airways
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Mon, 3 Mar - Tue, 18 Mar
18:50 - 12:15SEA-LHR
9h 25mdirect
15:00 - 16:55LHR-SEA
9h 55mdirect
£491Iberia
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Mon, 2 Dec - Tue, 10 Dec
17:05 - 10:30SEA-LHR
9h 25mdirect
13:15 - 15:15LHR-SEA
10h 00mdirect
£493Virgin Atlantic
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Mon, 2 Dec - Tue, 10 Dec
18:50 - 12:15SEA-LHR
9h 25mdirect
15:00 - 16:55LHR-SEA
9h 55mdirect
£498Iberia
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Mon, 13 Jan - Thu, 23 Jan
13:30 - 06:50SEA-LHR
9h 20mdirect
09:50 - 11:35LHR-SEA
9h 45mdirect
£500British Airways
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Wed, 23 Apr - Fri, 2 May
18:55 - 12:40SEA-LHR
9h 45mdirect
13:15 - 15:15LHR-SEA
10h 00mdirect
£513Delta
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Sun, 1 Dec - Tue, 17 Dec
19:05 - 12:40SEA-LHR
9h 35mdirect
15:50 - 18:15LHR-SEA
10h 25mdirect
£519KLM
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Sun, 2 Feb - Fri, 28 Feb
17:05 - 10:30SEA-LHR
9h 25mdirect
13:05 - 15:05LHR-SEA
10h 00mdirect
£550Delta
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Wed, 11 Dec - Sun, 22 Dec
18:55 - 12:40SEA-LHR
9h 45mdirect
15:50 - 18:30LHR-SEA
10h 40mdirect
£550KLM
Find Deal
Sun, 1 Dec - Sun, 8 Dec

Air Canada flights from Seattle to London

Our best Air Canada deals on Seattle to London flight tickets
Air Canada
2 Dec
SEA05:45Seattle/Tacoma Intl
19h 35m
2 stops
LHR09:20London Heathrow
10 Dec
LHR13:25London Heathrow
16h 35m
2 stops
SEA22:00Seattle/Tacoma Intl
Air Canada
2 Dec
SEA10:35Seattle/Tacoma Intl
14h 45m
2 stops
LHR09:20London Heathrow
10 Dec
LHR13:00London Heathrow
17h 00m
1 stop
SEA22:00Seattle/Tacoma Intl
Air Canada
2 Dec
SEA05:45Seattle/Tacoma Intl
19h 35m
2 stops
LHR09:20London Heathrow
10 Dec
LHR13:25London Heathrow
16h 35m
2 stops
SEA22:00Seattle/Tacoma Intl

WestJet flights from Seattle to London

Our best WestJet deals on Seattle to London flight tickets
WestJet
20 Nov
SEA15:15Seattle/Tacoma Intl
13h 35m
1 stop
LHR12:50London Heathrow
23 Nov
LHR14:50London Heathrow
31h 48m
1 stop
SEA14:38Seattle/Tacoma Intl
WestJet
31 Jan
SEA15:15Seattle/Tacoma Intl
13h 35m
1 stop
LHR12:50London Heathrow
5 Feb
LHR14:50London Heathrow
31h 31m
1 stop
SEA14:21Seattle/Tacoma Intl
WestJet
20 Nov
SEA15:15Seattle/Tacoma Intl
13h 35m
1 stop
LHR12:50London Heathrow
28 Nov
LHR14:50London Heathrow
31h 31m
1 stop
SEA14:21Seattle/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 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?

At midday. Seattle to London flights are approximately 28% more expensive in the morning than at midday

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

Icelandair. Icelandair, Air France, and British Airways 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, 7 flights take off from Seattle and land in London each day. The most common flight departure time for this route is 19:00, with 89% of daily flights taking off in the evening.

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

53 flights are operational weekly from Seattle to London as of November 2024. The most popular departure day for this route is Friday, with 30% of flights per week taking off on this day.

Can stopping save me money on Seattle to London flights?

You could potentially save up to 48% 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

£173

Fastest flight time

9h 20m

Direct flights

Every day

Airports in London

3 airports
The best one-way flight to London from Seattle in the past 72 hours is £173. The best return flight deal from Seattle to London found on momondo in the last 72 hours is £463.
The fastest flight from Seattle to London takes 9h 20m
Direct flights go from Seattle to London every day.
There are 3 airports near London: 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 £375Free CancellationRating
7.2
584 reviews
Search Icelandair flights
Air FrancePriceFrom £459Free CancellationRating
7.4
1,531 reviews
Search Air France flights
Virgin AtlanticPriceFrom £465Free CancellationRating
7.6
666 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £478Free CancellationRating
6.7
6,841 reviews
Search British Airways flights
  • Virgin Atlantic Flights From Seattle to London

    Virgin Atlantic flies from Seattle to London around 2 times per week, with 666 momondo users rating the airline 7.6/10. 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 £888 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, 1,531 ratings). Air France flies from Seattle to London around 2 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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