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Cheap flights from Seattle to London Heathrow Airport from £169

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 Heathrow Airport departing on 19/1. 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.
14:35 - 10:50SEA-LHR
12h 15m1 stop
12:15 - 17:00LHR-SEA
12h 45m1 stop
£435Icelandair
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Thu, 6 Feb - Wed, 12 Feb
15:35 - 10:50SEA-LHR
12h 15m1 stop
12:15 - 18:00LHR-SEA
12h 45m1 stop
£438Icelandair
Find Deal
Sun, 9 Mar - Thu, 20 Mar
14:35 - 15:35SEA-LHR
17h 00m2 stops
07:50 - 17:00LHR-SEA
17h 10m2 stops
Thu, 16 Jan - Thu, 23 Jan
14:35 - 10:50SEA-LHR
12h 15m1 stop
08:20 - 14:21LHR-SEA
38h 01m2 stops
Tue, 14 Jan - Sun, 19 Jan
10:35 - 10:10SEA-LHR
15h 35m1 stop
06:30 - 18:30LHR-SEA
20h 00m2 stops
£499Lufthansa
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Sun, 29 Dec - Tue, 14 Jan
17:45 - 11:10SEA-LHR
9h 25mdirect
06:20 - 11:20LHR-SEA
13h 00m1 stop
£502Virgin Atlantic
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Sun, 29 Dec - Tue, 14 Jan
10:35 - 10:10SEA-LHR
15h 35m1 stop
06:30 - 18:30LHR-SEA
20h 00m2 stops
£507Lufthansa
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Mon, 13 Jan - Tue, 28 Jan
18:50 - 12:15SEA-LHR
9h 25mdirect
08:20 - 19:02LHR-SEA
17h 42m1 stop
£515British 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
£528British Airways
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Wed, 8 Jan - Thu, 16 Jan
18:45 - 11:10SEA-LHR
9h 25mdirect
14:45 - 12:20LHR-SEA
28h 35m1 stop
£535Virgin Atlantic
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Fri, 14 Mar - Mon, 24 Mar
14:35 - 19:30SEA-LHR
20h 55m1 stop
£169Icelandair
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Sun, 19 Jan
15:15 - 12:50SEA-LHR
13h 35m1 stop
£177WestJet
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Tue, 21 Jan
05:45 - 12:50SEA-LHR
23h 05m2 stops
Mon, 10 Feb
13:58 - 12:50SEA-LHR
38h 52m2 stops
Fri, 17 Jan
11:45 - 16:00SEA-LHR
20h 15m2 stops
£302Scandinavian Airlines
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Tue, 14 Jan
07:20 - 09:20SEA-LHR
18h 00m2 stops
£313Scandinavian Airlines
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Tue, 29 Apr
19:50 - 12:15SEA-LHR
9h 25mdirect
£362British Airways
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Fri, 21 Mar
18:55 - 12:40SEA-LHR
9h 45mdirect
£365Virgin Atlantic
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Wed, 4 Dec
17:45 - 11:10SEA-LHR
9h 25mdirect
£373Virgin Atlantic
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Tue, 3 Dec
18:50 - 12:15SEA-LHR
9h 25mdirect
£382British Airways
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Wed, 27 Nov
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
08:05 - 09:20SEA-LHR
17h 15m2 stops
06:40 - 23:24LHR-SEA
24h 44m2 stops
Sun, 24 Nov - Mon, 9 Dec
08:05 - 09:20SEA-LHR
17h 15m2 stops
06:40 - 23:05LHR-SEA
24h 25m2 stops
Sun, 24 Nov - Fri, 6 Dec
07:20 - 09:40SEA-LHR
18h 20m1 stop
15:00 - 16:55LHR-SEA
9h 55mdirect
£818British Airways
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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
08:20 - 17:23LHR-SEA
17h 03m1 stop
£826British Airways
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Thu, 21 Nov - Tue, 10 Dec
19:25 - 13:10SEA-LHR
9h 45mdirect
06:20 - 11:20LHR-SEA
13h 00m1 stop
£893Air France
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Fri, 22 Nov - Thu, 12 Dec
14:35 - 10:50SEA-LHR
12h 15m1 stop
12:15 - 17:00LHR-SEA
12h 45m1 stop
£921Icelandair
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Thu, 21 Nov - Wed, 27 Nov
18:50 - 12:15SEA-LHR
9h 25mdirect
15:00 - 16:55LHR-SEA
9h 55mdirect
£508British Airways
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Tue, 28 Jan - Wed, 5 Feb
13:30 - 06:50SEA-LHR
9h 20mdirect
16:00 - 17:45LHR-SEA
9h 45mdirect
£509British Airways
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Wed, 23 Apr - Wed, 7 May
17:45 - 11:10SEA-LHR
9h 25mdirect
13:15 - 15:15LHR-SEA
10h 00mdirect
£510Virgin Atlantic
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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
18:50 - 12:15SEA-LHR
9h 25mdirect
09:25 - 12:20LHR-SEA
9h 55mdirect
£518British Airways
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Wed, 5 Mar - Tue, 18 Mar
18:50 - 12:15SEA-LHR
9h 25mdirect
15:00 - 16:55LHR-SEA
9h 55mdirect
£520Finnair
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Sun, 12 Jan - Wed, 12 Feb
19:40 - 13:00SEA-LHR
9h 20mdirect
09:45 - 11:30LHR-SEA
9h 45mdirect
£523Finnair
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Mon, 7 Apr - Thu, 15 May
17:45 - 11:10SEA-LHR
9h 25mdirect
12:40 - 14:40LHR-SEA
10h 00mdirect
£529Delta
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Wed, 8 Jan - Thu, 23 Jan
19:55 - 13:30SEA-LHR
9h 35mdirect
12:05 - 14:00LHR-SEA
9h 55mdirect
£531Delta
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Sun, 20 Apr - Wed, 30 Apr
19:55 - 13:30SEA-LHR
9h 35mdirect
17:00 - 19:35LHR-SEA
10h 35mdirect
£612Air France
Find Deal
Wed, 9 Apr - Thu, 15 May

Icelandair flights from Seattle to London Heathrow Airport

Our best Icelandair deals on Seattle to London Heathrow Airport flight tickets
Icelandair
6 Feb
SEA14:35Seattle/Tacoma Intl
12h 15m
1 stop
LHR10:50London Heathrow
12 Feb
LHR12:15London Heathrow
12h 45m
1 stop
SEA17:00Seattle/Tacoma Intl
Icelandair
9 Mar
SEA15:35Seattle/Tacoma Intl
12h 15m
1 stop
LHR10:50London Heathrow
20 Mar
LHR12:15London Heathrow
12h 45m
1 stop
SEA18:00Seattle/Tacoma Intl
Icelandair
16 Jan
SEA14:35Seattle/Tacoma Intl
12h 15m
1 stop
LHR10:50London Heathrow
23 Jan
LHR12:15London Heathrow
12h 45m
1 stop
SEA17:00Seattle/Tacoma Intl

Finnair flights from Seattle to London Heathrow Airport

Our best Finnair deals on Seattle to London Heathrow Airport 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
10 May
LHR10:20London Heathrow
13h 40m
1 stop
SEA16:00Seattle/Tacoma Intl

See travel insights to London from

How to get the cheapest flight ticket from Seattle to London Heathrow Airport

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 Heathrow Airport?

November. The cheapest time of year to fly to London Heathrow Airport from Seattle is November. The most expensive is June.

What is the cheapest day to depart Seattle for London Heathrow Airport?

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

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

In the evening. Seattle to London Heathrow Airport flights are approximately 10% more expensive at midday than in the evening

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

44 days before. The cheapest time to buy a flight from Seattle to London Heathrow Airport is approximately 44 days to departure

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

There are 3 cabin classes available to choose from on Seattle to London Heathrow Airport 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 Heathrow Airport flights?

You could potentially save up to 46% on your flight if you consider stops on a Seattle to London Heathrow Airport flight.

How have Seattle to London Heathrow Airport flight prices changed over time?

As of November 2024, prices for Seattle to London Heathrow Airport flights are approximately 41% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to London Heathrow Airport

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

Cheap Seattle to London Heathrow Airport (SEA to LHR) flight deals and tips

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

Best price found

£169

Fastest flight time

9h 20m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Seattle in the past 72 hours is £169. The best return flight deal from Seattle to London Heathrow Airport found on momondo in the last 72 hours is £435.
The fastest flight from Seattle to London Heathrow Airport takes 9h 20m
Direct flights go from Seattle to London Heathrow Airport every day.

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

    The distance between Seattle/Tacoma Intl and London Heathrow is about 4774.1 mi. By plane, this route typically takes 9h 20m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to London Heathrow Airport are refreshed on a daily basis.

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

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

    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 Heathrow Airport.

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

    The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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


Best airlines flying from Seattle to London Heathrow Airport

Compare and see reviews for airlines that fly from Seattle to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £394Free CancellationRating
7.2
555 reviews
Search Icelandair flights
Air FrancePriceFrom £468Free CancellationRating
7.4
1,525 reviews
Search Air France flights
Virgin AtlanticPriceFrom £474Free CancellationRating
7.5
663 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £488Free CancellationRating
6.6
6,837 reviews
Search British Airways flights
  • Virgin Atlantic Flights From Seattle to London Heathrow Airport

    Across 9 Virgin Atlantic flights from Seattle to London Heathrow Airport this week, the average price was £845, with the best Virgin Atlantic deals starting from £601 round-trip. 663 users have rated Virgin Atlantic on momondo, with an average score of 7.5/10.

  • Air France Flights From Seattle to London Heathrow Airport

    Another popular option for Seattle to London Heathrow Airport flights is Air France (7.4/10, 1,525 ratings). Air France flies from Seattle to London Heathrow Airport 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?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Seattle.

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?

momondo helps you find the best flight between Seattle and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Seattle and alert you when they change.


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