Cheap flights from London to Seattle from €426

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1 adult
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Sun 4/12
Sun 11/12

Flight information for London to Seattle
(LON to SEA)

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

Fastest flight time

8h 45m

Direct flights

Every day

Airports in Seattle

3 airports
The fastest flight from London to Seattle takes 8h 45m
Direct flights go from London to Seattle every day.
There are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA)

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?

February. The cheapest time of year to fly to Seattle from London is February. The most expensive is July.

What is the cheapest day to depart London for Seattle?

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

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

in the morning. London to Seattle flights are approximately 0% more expensive in the morning than in the morning

What is the cheapest London to Seattle flight route?

London Heathrow - Seattle/Tacoma Intl. Fly from London Heathrow 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

When you’re planning your trip from London to Seattle, the most popular airport-to-airport route is London Heathrow Airport to Seattle/Tacoma Intl Airport. When booking your trip to Seattle, it is helpful to have an alternative airport to fly out of. The nearest airport to London Heathrow Airport is London Gatwick Airport which is located in London. In November, €576 is typically the cheapest round trip price you’ll find from London to Seattle which you can find when you fly LHR — SEA.

London Heathrow Airport (LHR) to Seattle/Tacoma Intl Airport (SEA)€576
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London Gatwick Airport (LGW) to Seattle/Tacoma Intl Airport (SEA)€653
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Easily compare return flights from London to Seattle

Below you can see the best fares for your return flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from London to Seattle by changing tabs
Aer Lingus
4 Feb
LHR07:15London Heathrow
14h 10m
1 stop
SEA21:25Seattle/Tacoma Intl
11 Feb
SEA15:10Seattle/Tacoma Intl
12h 40m
1 stop
LHR03:50London Heathrow
Delta
16 Jan
LHR01:30London Heathrow
13h 25m
1 stop
SEA14:55Seattle/Tacoma Intl
23 Jan
SEA14:05Seattle/Tacoma Intl
9h 45m
LHR23:50London Heathrow
Virgin Atlantic
1 Mar
LHR01:20London Heathrow
14h 25m
1 stop
SEA15:45Seattle/Tacoma Intl
15 Mar
SEA03:35Seattle/Tacoma Intl
20h 20m
1 stop
LHR23:55London Heathrow
Lufthansa
17 Jan
LHR01:30London Heathrow
13h 50m
1 stop
SEA15:20Seattle/Tacoma Intl
25 Jan
SEA02:00Seattle/Tacoma Intl
16h 55m
1 stop
LHR18:55London Heathrow
Multiple Airlines
23 Jan
LHR01:50London Heathrow
20h 12m
2 stops
SEA22:02Seattle/Tacoma Intl
30 Jan
SEA02:00Seattle/Tacoma Intl
15h 40m
1 stop
LHR17:40London Heathrow
Icelandair
20 Jan
LGW07:00London Gatwick
13h 00m
1 stop
SEA20:00Seattle/Tacoma Intl
3 Feb
SEA09:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW21:55London Gatwick

Find the cheapest one-way flights from London to Seattle

If you're looking for one-way flights from London to Seattle, view some of our deals below provided by Icelandair, TAP AIR PORTUGAL and WestJet
WestJet
6 Feb
LHR09:50London Heathrow
28h 39m
1 stop
SEA14:29Seattle/Tacoma Intl
Multiple Airlines
3 Mar
LGW03:10London Gatwick
16h 50m
1 stop
SEA20:00Seattle/Tacoma Intl
TAP AIR PORTUGAL
1 Mar
LGW11:35London Gatwick
37h 38m
2 stops
SEA01:13Seattle/Tacoma Intl

Search last-minute flights to Seattle from London

Find and compare return flight prices for your last-minute flight from London to Seattle
Multiple Airlines
6 Dec
LHR01:50London Heathrow
19h 52m
2 stops
SEA21:42Seattle/Tacoma Intl
14 Dec
SEA01:49Seattle/Tacoma Intl
15h 51m
1 stop
LHR17:40London Heathrow
Lufthansa
6 Dec
LHR01:30London Heathrow
13h 50m
1 stop
SEA15:20Seattle/Tacoma Intl
14 Dec
SEA01:49Seattle/Tacoma Intl
15h 51m
1 stop
LHR17:40London Heathrow
British Airways
5 Dec
LHR08:35London Heathrow
16h 21m
1 stop
SEA00:56Seattle/Tacoma Intl
19 Jan
SEA07:00Seattle/Tacoma Intl
15h 40m
1 stop
LHR22:40London Heathrow
Austrian Airlines
4 Dec
LHR05:25London Heathrow
16h 17m
1 stop
SEA21:42Seattle/Tacoma Intl
11 Dec
SEA01:49Seattle/Tacoma Intl
17h 06m
1 stop
LHR18:55London Heathrow
United Airlines
6 Dec
LHR01:30London Heathrow
13h 50m
1 stop
SEA15:20Seattle/Tacoma Intl
1 Jan
SEA00:03Seattle/Tacoma Intl
20h 37m
1 stop
LHR20:40London Heathrow
Delta
6 Dec
LHR01:30London Heathrow
13h 30m
1 stop
SEA15:00Seattle/Tacoma Intl
13 Dec
SEA09:10Seattle/Tacoma Intl
9h 25m
LHR18:35London Heathrow

Aer Lingus flights from London to Seattle

Our best Aer Lingus deals on London to Seattle flight tickets
Aer Lingus
4 Feb
LHR07:15London Heathrow
14h 10m
1 stop
SEA21:25Seattle/Tacoma Intl
11 Feb
SEA15:10Seattle/Tacoma Intl
12h 40m
1 stop
LHR03:50London Heathrow
Aer Lingus
2 Mar
LGW06:05London Gatwick
15h 20m
1 stop
SEA21:25Seattle/Tacoma Intl
12 Mar
SEA17:10Seattle/Tacoma Intl
14h 35m
1 stop
LGW07:45London Gatwick
Aer Lingus
17 Apr
LGW06:55London Gatwick
14h 10m
1 stop
SEA21:05Seattle/Tacoma Intl
8 May
SEA14:50Seattle/Tacoma Intl
13h 45m
1 stop
LGW04:35London Gatwick

United Airlines flights from London to Seattle

Our best United Airlines deals on London to Seattle flight tickets
United Airlines
10 Jan
LHR07:00London Heathrow
18h 54m
2 stops
SEA01:54Seattle/Tacoma Intl
30 Jan
SEA00:15Seattle/Tacoma Intl
17h 25m
2 stops
LHR17:40London Heathrow
United Airlines
6 Dec
LHR01:30London Heathrow
13h 50m
1 stop
SEA15:20Seattle/Tacoma Intl
1 Jan
SEA00:03Seattle/Tacoma Intl
20h 37m
1 stop
LHR20:40London Heathrow

  • Are airlines flying from London to Seattle/Tacoma Intl offering flexible changes due to COVID-19?

    Some of our partner airlines flying from London to Seattle/Tacoma Intl are adapting new policies due to the global impact of COVID-19. One of the airlines that may be waiving their change fees is British Airways. You can search for the full list of airlines such as British Airways that are offering this flexibility.

  • 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 10h 00m, depending on flying conditions and air traffic around both airports.


Why use momondo?

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.

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.

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.

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.


Save money when you book flights with momondo
Flexible Travel
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