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Cheap flights from London to Seattle from €411

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 2/5. 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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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

€411

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 €411. The best return flight deal from London to Seattle found on momondo in the last 72 hours is €553.
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 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?

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?

London to Seattle flights are currently only available 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?

48 days before. The cheapest time to buy a flight from London to Seattle is approximately 48 days to departure

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

21 flights are operational weekly from London to Seattle as of March 2024. The most popular departure time for this route is 11:00, with 51% of flights per day taking off in the afternoon.

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

As of March 2024, there are 149 flights per week flying from London to Seattle. The most common day of the week flights depart is Saturday, with 17% of flights taking off on this day.

Can stopping save me money on London to Seattle flights?

You could potentially save up to 4% on your flight if you consider stops on a London to Seattle flight.

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 March, €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)€791
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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 six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from London to Seattle by changing tabs
KLM
17 Apr
LGW12:00London Gatwick
18h 24m
1 stop
SEA22:24Seattle/Tacoma Intl
24 Apr
SEA06:00Seattle/Tacoma Intl
20h 00m
2 stops
LGW10:00London Gatwick
Multiple Airlines
17 Apr
LHR06:30London Heathrow
13h 55m
1 stop
SEA12:25Seattle/Tacoma Intl
24 Apr
SEA07:00Seattle/Tacoma Intl
14h 55m
1 stop
LHR05:55London Heathrow
Austrian Airlines
16 Apr
LHR19:30London Heathrow
31h 15m
2 stops
SEA18:45Seattle/Tacoma Intl
23 Apr
SEA08:06Seattle/Tacoma Intl
14h 39m
1 stop
LHR06:45London Heathrow
Delta
8 Apr
LHR11:45London Heathrow
12h 55m
1 stop
SEA16:40Seattle/Tacoma Intl
21 Apr
SEA00:35Seattle/Tacoma Intl
22h 40m
1 stop
LHR07:15London Heathrow
Virgin Atlantic
15 Apr
LHR20:55London Heathrow
21h 20m
1 stop
SEA10:15Seattle/Tacoma Intl
29 Apr
SEA07:50Seattle/Tacoma Intl
15h 15m
1 stop
LHR07:05London Heathrow
British Airways
16 Apr
LHR09:50London Heathrow
9h 45m
SEA11:35Seattle/Tacoma Intl
23 Apr
SEA13:42Seattle/Tacoma Intl
15h 03m
1 stop
LHR12:45London Heathrow

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 British Airways, JetBlue and WestJet
Multiple Airlines
2 May
LHR06:30London Heathrow
24h 43m
2 stops
SEA23:13Seattle/Tacoma Intl
WestJet
23 Apr
LHR14:10London Heathrow
26h 45m
2 stops
SEA08:55Seattle/Tacoma Intl
JetBlue
6 May
LGW10:30London Gatwick
20h 19m
1 stop
SEA22:49Seattle/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
Delta
8 Apr
LHR11:45London Heathrow
12h 55m
1 stop
SEA16:40Seattle/Tacoma Intl
21 Apr
SEA00:35Seattle/Tacoma Intl
22h 40m
1 stop
LHR07:15London Heathrow
British Airways
8 Apr
LHR16:00London Heathrow
9h 45m
SEA17:45Seattle/Tacoma Intl
22 Apr
SEA19:40Seattle/Tacoma Intl
9h 20m
LHR13:00London Heathrow
Virgin Atlantic
8 Apr
LHR12:45London Heathrow
9h 55m
SEA14:40Seattle/Tacoma Intl
22 Apr
SEA16:30Seattle/Tacoma Intl
9h 20m
LHR09:50London Heathrow
SWISS
8 Apr
LHR18:40London Heathrow
34h 54m
2 stops
SEA21:34Seattle/Tacoma Intl
16 Apr
SEA13:10Seattle/Tacoma Intl
24h 35m
2 stops
LHR21:45London Heathrow
Aer Lingus
3 Apr
LHR06:45London Heathrow
17h 45m
1 stop
SEA16:30Seattle/Tacoma Intl
10 Apr
SEA18:45Seattle/Tacoma Intl
12h 10m
1 stop
LHR14:55London Heathrow
Multiple Airlines
4 Apr
LHR06:40London Heathrow
23h 45m
2 stops
SEA22:25Seattle/Tacoma Intl
25 Apr
SEA09:30Seattle/Tacoma Intl
22h 30m
2 stops
LHR16:00London Heathrow

KLM flights from London to Seattle

Our best KLM deals on London to Seattle flight tickets
KLM
17 Apr
LGW12:00London Gatwick
18h 24m
1 stop
SEA22:24Seattle/Tacoma Intl
24 Apr
SEA06:00Seattle/Tacoma Intl
20h 00m
2 stops
LGW10:00London Gatwick
KLM
26 Apr
LGW12:00London Gatwick
18h 25m
1 stop
SEA22:25Seattle/Tacoma Intl
3 May
SEA23:05Seattle/Tacoma Intl
26h 55m
2 stops
LGW10:00London Gatwick
KLM
26 Apr
LGW12:00London Gatwick
18h 25m
1 stop
SEA22:25Seattle/Tacoma Intl
3 May
SEA23:05Seattle/Tacoma Intl
26h 55m
2 stops
LGW10:00London Gatwick

Austrian Airlines flights from London to Seattle

Our best Austrian Airlines deals on London to Seattle flight tickets
Austrian Airlines
16 Apr
LHR09:05London Heathrow
41h 40m
2 stops
SEA18:45Seattle/Tacoma Intl
23 Apr
SEA07:00Seattle/Tacoma Intl
42h 40m
2 stops
LHR09:40London Heathrow
Austrian Airlines
23 Apr
LHR06:00London Heathrow
20h 45m
2 stops
SEA18:45Seattle/Tacoma Intl
30 Apr
SEA07:00Seattle/Tacoma Intl
20h 45m
1 stop
LHR11:45London Heathrow
Austrian Airlines
8 May
LHR06:00London Heathrow
22h 18m
2 stops
SEA20:18Seattle/Tacoma Intl
15 May
SEA08:06Seattle/Tacoma Intl
18h 34m
1 stop
LHR10:40London Heathrow

  • 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.


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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