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Cheap flights from London to Seattle from €330

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
€415Icelandair
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Thu, 16 Jan - Mon, 20 Jan
12:15 - 17:00LHR-SEA
12h 45m1 stop
14:35 - 19:30SEA-LHR
20h 55m1 stop
€442Icelandair
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Mon, 3 Feb - Mon, 17 Feb
18:45 - 21:20LGW-SEA
34h 35m2 stops
15:25 - 17:50SEA-LGW
18h 25m2 stops
€495SWISS
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Tue, 4 Feb - Tue, 11 Feb
06:00 - 22:53LHR-SEA
24h 53m2 stops
12:50 - 08:05SEA-LHR
35h 15m2 stops
€496SWISS
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Tue, 4 Feb - Tue, 11 Feb
06:30 - 12:10LHR-SEA
13h 40m1 stop
06:10 - 08:25SEA-LHR
18h 15m2 stops
€496United Airlines
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Mon, 20 Jan - Mon, 27 Jan
12:05 - 20:31LHR-SEA
40h 26m2 stops
07:05 - 11:15SEA-LHR
20h 10m1 stop
€498Austrian Airlines
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Mon, 10 Feb - Mon, 17 Feb
06:50 - 22:42LHR-SEA
23h 52m2 stops
15:45 - 09:40SEA-LHR
34h 55m1 stop
€500United Airlines
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Wed, 5 Mar - Sun, 16 Mar
06:20 - 12:04LHR-SEA
13h 44m1 stop
17:45 - 11:10SEA-LHR
9h 25mdirect
€505Virgin Atlantic
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Mon, 3 Feb - Mon, 17 Feb
13:15 - 15:15LHR-SEA
10h 00mdirect
17:45 - 11:10SEA-LHR
9h 25mdirect
€519Virgin Atlantic
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Mon, 3 Feb - Mon, 17 Feb
19:25 - 20:31LHR-SEA
33h 06m2 stops
08:00 - 07:55SEA-LHR
39h 55m2 stops
€568Austrian Airlines
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Fri, 17 Jan - Fri, 24 Jan
12:00 - 00:19LGW-SEA
20h 19m1 stop
€330
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Tue, 14 Jan
14:50 - 14:21LHR-SEA
31h 31m1 stop
€353WestJet
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Mon, 20 Jan
14:50 - 14:21LHR-SEA
31h 31m1 stop
€356WestJet
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Sat, 18 Jan
12:15 - 18:00LHR-SEA
12h 45m1 stop
€619Icelandair
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Wed, 19 Mar
08:25 - 22:38LHR-SEA
22h 13m1 stop
€716JetBlue
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Mon, 3 Mar
16:40 - 22:00LGW-SEA
37h 20m2 stops
€845TAP AIR PORTUGAL
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Fri, 31 Jan
18:30 - 22:00LHR-SEA
35h 30m2 stops
€849TAP AIR PORTUGAL
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Sun, 12 Jan
15:00 - 16:55LHR-SEA
9h 55mdirect
€1,449Finnair
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Mon, 24 Feb
16:30 - 18:20LHR-SEA
9h 50mdirect
€1,608Finnair
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Fri, 20 Jun
11:55 - 23:59LGW-SEA
20h 04m2 stops
€3,798Icelandair
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Thu, 2 Jan
06:30 - 11:52LHR-SEA
13h 22m1 stop
17:45 - 11:10SEA-LHR
9h 25mdirect
€902Delta
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Tue, 24 Dec - Wed, 8 Jan
06:30 - 11:52LHR-SEA
13h 22m1 stop
19:04 - 12:40SEA-LHR
9h 36mdirect
€906KLM
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Wed, 25 Dec - Wed, 8 Jan
07:40 - 13:20LHR-SEA
13h 40m1 stop
23:17 - 20:35SEA-LHR
13h 18m1 stop
€1,027
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Tue, 24 Dec - Wed, 8 Jan
06:35 - 13:20LHR-SEA
14h 45m1 stop
23:17 - 20:35SEA-LHR
13h 18m1 stop
€1,028
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Tue, 24 Dec - Wed, 8 Jan
13:00 - 22:00LHR-SEA
17h 00m1 stop
23:17 - 20:35SEA-LHR
13h 18m1 stop
€1,046United Airlines
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Wed, 25 Dec - Wed, 8 Jan
13:00 - 22:00LHR-SEA
17h 00m1 stop
23:17 - 20:35SEA-LHR
13h 18m1 stop
€1,082United Airlines
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Fri, 27 Dec - Wed, 8 Jan
08:45 - 18:25LHR-SEA
17h 40m2 stops
10:35 - 09:20SEA-LHR
14h 45m2 stops
€1,096Lufthansa
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Tue, 24 Dec - Wed, 8 Jan
18:45 - 21:15LGW-SEA
34h 30m2 stops
10:56 - 17:50SEA-LGW
22h 54m2 stops
€1,115SWISS
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Wed, 25 Dec - Wed, 1 Jan
20:15 - 13:20LHR-SEA
25h 05m1 stop
10:35 - 10:10SEA-LHR
15h 35m1 stop
€1,345Lufthansa
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Mon, 23 Dec - Sun, 5 Jan
18:45 - 21:15LGW-SEA
34h 30m2 stops
12:36 - 17:50SEA-LGW
21h 14m2 stops
€1,548SWISS
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Tue, 24 Dec - Sun, 5 Jan
13:15 - 15:15LHR-SEA
10h 00mdirect
17:45 - 11:10SEA-LHR
9h 25mdirect
€519Virgin Atlantic
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Mon, 3 Feb - Mon, 17 Feb
15:00 - 16:55LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
€533Finnair
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Mon, 3 Feb - Mon, 17 Feb
15:00 - 16:55LHR-SEA
9h 55mdirect
18:50 - 12:15SEA-LHR
9h 25mdirect
€560British Airways
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Thu, 16 Jan - Mon, 20 Jan
09:25 - 11:20LHR-SEA
9h 55mdirect
13:35 - 07:00SEA-LHR
9h 25mdirect
€571British Airways
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Tue, 4 Feb - Tue, 11 Feb
13:05 - 15:05LHR-SEA
10h 00mdirect
17:45 - 11:10SEA-LHR
9h 25mdirect
€576Delta
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Sun, 2 Feb - Wed, 19 Feb
17:00 - 19:35LHR-SEA
10h 35mdirect
19:55 - 13:30SEA-LHR
9h 35mdirect
€587Delta
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Mon, 21 Apr - Thu, 3 Jul
09:25 - 11:20LHR-SEA
9h 55mdirect
13:45 - 07:10SEA-LHR
9h 25mdirect
€596British Airways
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Fri, 31 Jan - Sat, 8 Feb
17:00 - 19:35LHR-SEA
10h 35mdirect
19:55 - 13:30SEA-LHR
9h 35mdirect
€839KLM
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Tue, 8 Apr - Wed, 23 Apr
17:00 - 19:35LHR-SEA
10h 35mdirect
19:55 - 13:30SEA-LHR
9h 35mdirect
€874KLM
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Thu, 10 Apr - Thu, 24 Apr
15:50 - 18:20LHR-SEA
10h 30mdirect
17:45 - 11:10SEA-LHR
9h 25mdirect
€3,241Air France
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Sun, 5 Jan - Tue, 7 Jan

United Airlines flights from London to Seattle

Our best United Airlines deals on London to Seattle flight tickets
United Airlines
4 Feb
LHR07:40London Heathrow
13h 40m
1 stop
SEA13:20Seattle/Tacoma Intl
11 Feb
SEA11:05Seattle/Tacoma Intl
12h 50m
1 stop
LHR07:55London Heathrow
United Airlines
20 Jan
LHR06:30London Heathrow
13h 40m
1 stop
SEA12:10Seattle/Tacoma Intl
27 Jan
SEA06:10Seattle/Tacoma Intl
18h 15m
2 stops
LHR08:25London Heathrow
United Airlines
5 Mar
LHR06:50London Heathrow
23h 52m
2 stops
SEA22:42Seattle/Tacoma Intl
16 Mar
SEA15:45Seattle/Tacoma Intl
34h 55m
1 stop
LHR09:40London Heathrow

Austrian Airlines flights from London to Seattle

Our best Austrian Airlines deals on London to Seattle flight tickets
Austrian Airlines
10 Feb
LHR12:05London Heathrow
40h 26m
2 stops
SEA20:31Seattle/Tacoma Intl
17 Feb
SEA07:05Seattle/Tacoma Intl
20h 10m
1 stop
LHR11:15London Heathrow
Austrian Airlines
17 Jan
LHR19:25London Heathrow
33h 06m
2 stops
SEA20:31Seattle/Tacoma Intl
24 Jan
SEA08:00Seattle/Tacoma Intl
39h 55m
2 stops
LHR07:55London Heathrow
Austrian Airlines
18 Jan
LHR06:00London Heathrow
22h 31m
2 stops
SEA20:31Seattle/Tacoma Intl
25 Jan
SEA08:00Seattle/Tacoma Intl
39h 55m
2 stops
LHR07:55London 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 to Seattle?

If you’re not able to fly to Seattle in January, then February is your next best option. Flight prices from London to Seattle during February average around €611.

What is the cheapest London to Seattle/Tacoma Intl flight route?

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

How far in advance should I book a flight to Seattle?

We recommend purchasing flights from London to Seattle 54 days ahead of your departure date because this is when momondo users tend to see the best flight rates. On average, our users have found flights to Seattle for €742. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from London for as low as €601 on momondo.

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

There are 1 cabin classes available to choose from on London to Seattle/Tacoma Intl 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 London to Seattle flights?

You could potentially save up to 77% 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 December 2024, prices for London to Seattle flights are approximately 8% more expensive when compared to flights at the same time last year.

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

€330

Fastest flight time

9h 45m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from London in the past 72 hours is €330. The best return flight deal from London to Seattle found on momondo in the last 72 hours is €415.
The fastest flight from London to Seattle takes 9h 45m
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 45m, 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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