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Cheap flights from London to Seattle from €348

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Seattle 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 London to Seattle

Cheap return flights

These are some of the best return flight deals from London to Seattle 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 London to Seattle.

Cheap last-minute flights

Planning a quick getaway from London to Seattle? 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 Seattle, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from London to Seattle

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

All round-trip flight deals to Seattle

The cheapest plane tickets to Seattle found on KAYAK recently.
11:55 - 17:00LGW-SEA
13h 05m1 stop
14:35 - 10:55SEA-LGW
12h 20m1 stop
€508Icelandair
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Fri, 7 Feb - Fri, 21 Feb
14:50 - 14:21LHR-SEA
31h 31m1 stop
15:15 - 12:50SEA-LHR
13h 35m1 stop
€526WestJet
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Thu, 16 Jan - Mon, 20 Jan
06:30 - 11:50LHR-SEA
13h 20m1 stop
19:00 - 12:40SEA-LHR
9h 40mdirect
€572Delta
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Wed, 15 Jan - Wed, 22 Jan
06:30 - 11:45LHR-SEA
13h 15m1 stop
17:45 - 11:10SEA-LHR
9h 25mdirect
€577Delta
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Tue, 11 Feb - Thu, 20 Feb
12:00 - 00:14LGW-SEA
20h 14m1 stop
05:30 - 10:35SEA-LGW
21h 05m1 stop
€609
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Tue, 21 Jan - Thu, 30 Jan
14:00 - 21:55LGW-SEA
39h 55m1 stop
05:30 - 10:35SEA-LGW
21h 05m1 stop
€628
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Mon, 13 Jan - Thu, 23 Jan
13:00 - 22:00LHR-SEA
17h 00m1 stop
05:45 - 10:10SEA-LHR
20h 25m1 stop
€640United Airlines
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Wed, 12 Feb - Tue, 25 Feb
18:00 - 21:30LHR-SEA
35h 30m1 stop
07:00 - 10:50SEA-LHR
19h 50m2 stops
€645United Airlines
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Wed, 8 Jan - Mon, 13 Jan
09:25 - 11:20LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
€652British Airways
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Tue, 11 Feb - Mon, 24 Feb
15:00 - 16:55LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
€656British Airways
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Wed, 22 Jan - Wed, 29 Jan
12:00 - 00:14LGW-SEA
20h 14m1 stop
€348
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Tue, 14 Jan
14:50 - 14:21LHR-SEA
31h 31m1 stop
€350WestJet
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Sun, 19 Jan
13:00 - 14:58LGW-SEA
33h 58m1 stop
€368
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Tue, 4 Feb
14:00 - 21:55LGW-SEA
39h 55m1 stop
€416
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Mon, 20 Jan
12:00 - 11:55LGW-SEA
31h 55m1 stop
€432
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Sun, 8 Dec
12:15 - 17:00LHR-SEA
12h 45m1 stop
€614Icelandair
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Wed, 27 Nov
07:40 - 13:20LHR-SEA
13h 40m1 stop
€665Lufthansa
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Tue, 26 Nov
19:25 - 20:20LHR-SEA
32h 55m2 stops
€670Austrian Airlines
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Mon, 25 Nov
20:05 - 22:46LHR-SEA
34h 41m2 stops
€671SWISS
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Mon, 25 Nov
11:55 - 20:49LGW-SEA
16h 54m2 stops
€2,434Icelandair
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Fri, 3 Jan
13:45 - 19:13LHR-SEA
37h 28m1 stop
06:05 - 06:30SEA-LHR
16h 25m1 stop
€598United Airlines
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Sat, 23 Nov - Mon, 25 Nov
13:00 - 08:36LHR-SEA
27h 36m2 stops
06:05 - 08:30SEA-LHR
18h 25m1 stop
€604United Airlines
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Sat, 23 Nov - Mon, 25 Nov
12:15 - 17:00LHR-SEA
12h 45m1 stop
14:35 - 10:50SEA-LHR
12h 15m1 stop
€737Icelandair
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Mon, 25 Nov - Mon, 13 Jan
12:40 - 22:25LHR-SEA
17h 45m1 stop
17:45 - 11:10SEA-LHR
9h 25mdirect
€798Delta
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Mon, 25 Nov - Sat, 11 Jan
06:40 - 22:23LHR-SEA
23h 43m2 stops
10:15 - 16:00SEA-LHR
21h 45m2 stops
€808Scandinavian Airlines
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Mon, 25 Nov - Sun, 12 Jan
09:10 - 16:23LHR-SEA
15h 13m1 stop
17:45 - 11:10SEA-LHR
9h 25mdirect
€809Delta
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Mon, 25 Nov - Tue, 7 Jan
05:55 - 17:05LGW-SEA
19h 10m1 stop
19:00 - 16:00SEA-LGW
37h 00m1 stop
€853Turkish Airlines
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Sat, 23 Nov - Sun, 1 Dec
16:55 - 17:05LGW-SEA
32h 10m1 stop
19:00 - 21:30SEA-LGW
18h 30m1 stop
€864Turkish Airlines
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Mon, 25 Nov - Mon, 13 Jan
06:40 - 22:23LHR-SEA
23h 43m2 stops
11:45 - 16:00SEA-LHR
20h 15m2 stops
€934Scandinavian Airlines
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Mon, 25 Nov - Fri, 10 Jan
11:55 - 20:44LGW-SEA
16h 49m2 stops
14:35 - 10:55SEA-LGW
12h 20m1 stop
€2,143Icelandair
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Sat, 23 Nov - Sun, 1 Dec
15:50 - 18:25LHR-SEA
10h 35mdirect
19:00 - 12:40SEA-LHR
9h 40mdirect
€605Delta
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Wed, 15 Jan - Wed, 22 Jan
13:15 - 15:15LHR-SEA
10h 00mdirect
19:00 - 12:40SEA-LHR
9h 40mdirect
€606Delta
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Mon, 9 Dec - Wed, 15 Jan
09:25 - 11:20LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
€652British Airways
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Tue, 11 Feb - Mon, 24 Feb
15:00 - 16:55LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
€656British Airways
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Wed, 22 Jan - Wed, 29 Jan
09:25 - 11:20LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
€659Finnair
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Tue, 14 Jan - Mon, 20 Jan
15:00 - 16:55LHR-SEA
9h 55mdirect
13:35 - 07:00SEA-LHR
9h 25mdirect
€660Finnair
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Wed, 22 Jan - Tue, 4 Feb
15:50 - 18:25LHR-SEA
10h 35mdirect
19:05 - 12:40SEA-LHR
9h 35mdirect
€723KLM
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Fri, 24 Jan - Sun, 2 Feb
13:05 - 15:05LHR-SEA
10h 00mdirect
17:45 - 11:10SEA-LHR
9h 25mdirect
€1,140Air France
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Sat, 14 Dec - Thu, 2 Jan
15:50 - 18:25LHR-SEA
10h 35mdirect
19:00 - 12:40SEA-LHR
9h 40mdirect
€1,220KLM
Find Deal
Wed, 15 Jan - Wed, 22 Jan
13:05 - 15:05LHR-SEA
10h 00mdirect
17:45 - 11:10SEA-LHR
9h 25mdirect
€1,518Air France
Find Deal
Sat, 21 Dec - Sat, 4 Jan

Icelandair flights from London to Seattle

Our best Icelandair deals on London to Seattle flight tickets
Icelandair
7 Feb
LGW11:55London Gatwick
13h 05m
1 stop
SEA17:00Seattle/Tacoma Intl
19 Feb
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
Icelandair
22 Jan
LHR12:15London Heathrow
12h 45m
1 stop
SEA17:00Seattle/Tacoma Intl
1 Feb
SEA14:35Seattle/Tacoma Intl
20h 55m
1 stop
LHR19:30London Heathrow
Icelandair
13 Jan
LHR12:15London Heathrow
12h 45m
1 stop
SEA17:00Seattle/Tacoma Intl
19 Jan
SEA14:35Seattle/Tacoma Intl
20h 55m
1 stop
LHR19:30London Heathrow

Delta flights from London to Seattle

Our best Delta deals on London to Seattle flight tickets
Delta
15 Jan
LHR06:30London Heathrow
13h 20m
1 stop
SEA11:50Seattle/Tacoma Intl
22 Jan
SEA19:00Seattle/Tacoma Intl
9h 40m
LHR12:40London Heathrow
Delta
11 Feb
LHR06:30London Heathrow
13h 15m
1 stop
SEA11:45Seattle/Tacoma Intl
20 Feb
SEA17:45Seattle/Tacoma Intl
9h 25m
LHR11:10London Heathrow
Delta
4 Dec
LHR06:20London Heathrow
13h 49m
1 stop
SEA12:09Seattle/Tacoma Intl
12 Mar
SEA18:45Seattle/Tacoma Intl
9h 25m
LHR11:10London Heathrow

See travel insights to Seattle from

How to get the cheapest flight ticket from London to Seattle

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 London to Seattle?

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

What is the cheapest day to depart London for Seattle?

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

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

In the morning. London to Seattle flights are approximately 15% more expensive in the afternoon than in the morning

What is the cheapest London to Seattle flight route?

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

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

43 days before. The cheapest time to buy a flight from London to Seattle is approximately 43 days to departure

Can stopping save me money on London to Seattle flights?

You could potentially save up to 75% on your flight if you consider stops on a London to Seattle flight.

How have London to Seattle flight prices changed over time?

As of November 2024, prices for London to Seattle flights are approximately 4% more expensive when compared to flights at the same time last year.

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


When to book flights from London to Seattle

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

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

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

Best price found

€348

Fastest flight time

9h 55m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from London in the past 72 hours is €348. The best return flight deal from London to Seattle found on momondo in the last 72 hours is €508.
The fastest flight from London to Seattle takes 9h 55m
Direct flights go from London to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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

    Seattle/Tacoma Intl is 7694.7 km away from London. Flights usually cover this in 9h 55m, depending on flying conditions and air traffic around both airports.

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from London to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl 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 licence and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl 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 London to Seattle?


Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Seattle for you.

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

Flights from London to Seattle 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 London to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from London to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.


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