Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London to Seattle from €477

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 18/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted the Winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from London to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
€518Icelandair
Find Deal
Mon, 24 Nov - Mon, 8 Dec
Icelandair Logo
20:35 - 17:00LHR-SEA
28h 25m1 stop
Icelandair Logo
14:35 - 19:30SEA-LHR
20h 55m1 stop
€520Icelandair
Find Deal
Mon, 24 Nov - Mon, 8 Dec
Multiple Airlines Logo
06:40 - 17:00LHR-SEA
18h 20m2 stops
Multiple Airlines Logo
14:35 - 21:20SEA-LHR
22h 45m2 stops
€533Multiple Airlines
Find Deal
Mon, 24 Nov - Mon, 8 Dec
Virgin Atlantic Logo
06:20 - 13:20LHR-SEA
15h 00m1 stop
Virgin Atlantic Logo
16:45 - 10:30SEA-LHR
9h 45mdirect
€552Virgin Atlantic
Find Deal
Wed, 25 Feb - Sat, 7 Mar
Virgin Atlantic Logo
06:20 - 14:05LHR-SEA
14h 45m1 stop
Virgin Atlantic Logo
17:40 - 10:30SEA-LHR
9h 50mdirect
€553Virgin Atlantic
Find Deal
Mon, 9 Mar - Thu, 19 Mar
Delta Logo
10:00 - 11:40LHR-SEA
33h 40m1 stop
Delta Logo
16:45 - 10:30SEA-LHR
9h 45mdirect
€560Delta
Find Deal
Mon, 23 Feb - Thu, 5 Mar
Delta Logo
06:30 - 11:40LHR-SEA
13h 10m1 stop
Delta Logo
16:45 - 10:30SEA-LHR
9h 45mdirect
€567Delta
Find Deal
Tue, 24 Feb - Fri, 6 Mar
Multiple Airlines Logo
06:30 - 11:40LHR-SEA
13h 10m1 stop
Multiple Airlines Logo
17:40 - 10:30SEA-LHR
9h 50mdirect
€568Multiple Airlines
Find Deal
Tue, 24 Feb - Sun, 8 Mar
United Airlines Logo
06:30 - 12:10LHR-SEA
13h 40m1 stop
United Airlines Logo
08:10 - 08:25SEA-LHR
16h 15m2 stops
€570United Airlines
Find Deal
Tue, 25 Nov - Tue, 2 Dec
United Airlines Logo
06:30 - 12:10LHR-SEA
13h 40m1 stop
United Airlines Logo
23:50 - 21:20SEA-LHR
13h 30m1 stop
€596United Airlines
Find Deal
Mon, 24 Nov - Mon, 8 Dec

Icelandair flights from London to Seattle

Our best Icelandair deals on London to Seattle flight tickets
Icelandair
24 Nov
LGW11:55London Gatwick
13h 05m
1 stop
SEA17:00Seattle/Tacoma Intl
8 Dec
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
€518
Find similar
Icelandair
24 Nov
LHR20:35London Heathrow
28h 25m
1 stop
SEA17:00Seattle/Tacoma Intl
8 Dec
SEA14:35Seattle/Tacoma Intl
20h 55m
1 stop
LHR19:30London Heathrow
€520
Find similar
Icelandair
12 Nov
LGW11:55London Gatwick
13h 05m
1 stop
SEA17:00Seattle/Tacoma Intl
20 Nov
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
€545
Find similar

Virgin Atlantic flights from London to Seattle

Our best Virgin Atlantic deals on London to Seattle flight tickets
Virgin Atlantic
25 Feb
LHR06:20London Heathrow
15h 00m
1 stop
SEA13:20Seattle/Tacoma Intl
7 Mar
SEA16:45Seattle/Tacoma Intl
9h 45m
LHR10:30London Heathrow
€552
Find similar
Virgin Atlantic
9 Mar
LHR06:20London Heathrow
14h 45m
1 stop
SEA14:05Seattle/Tacoma Intl
19 Mar
SEA17:40Seattle/Tacoma Intl
9h 50m
LHR10:30London Heathrow
€553
Find similar
Virgin Atlantic
25 Feb
LHR12:20London Heathrow
10h 25m
SEA14:45Seattle/Tacoma Intl
7 Mar
SEA16:45Seattle/Tacoma Intl
9h 45m
LHR10:30London Heathrow
€563
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 13,528 searches. Data last updated 29 October 2025.
Use the filters below to find and compare flights from London to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 24/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Mon 8/12

14:35-10:55

1 stop12h 20m

€518

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 24/11

20:35-17:00

1 stop28h 25m

Seattle/Tacoma Intl

Mon 8/12

14:35-19:30

1 stop20h 55m

€520

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 24/11

06:40-17:00

2 stops18h 20m

Seattle/Tacoma Intl

Mon 8/12

14:35-21:20

2 stops22h 45m

€533

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Wed 25/2

06:20-13:20

1 stop15h 00m

Seattle/Tacoma Intl

Sat 7/3

16:45-10:30

Nonstop9h 45m

€552

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 9/3

06:20-14:05

1 stop14h 45m

Seattle/Tacoma Intl

Thu 19/3

17:40-10:30

Nonstop9h 50m

€553

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 23/2

10:00-11:40

1 stop33h 40m

Seattle/Tacoma Intl

Thu 5/3

16:45-10:30

Nonstop9h 45m

€560

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 24/2

06:30-11:40

1 stop13h 10m

Seattle/Tacoma Intl

Fri 6/3

16:45-10:30

Nonstop9h 45m

€567

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 24/2

06:30-11:40

1 stop13h 10m

Seattle/Tacoma Intl

Sun 8/3

17:40-10:30

Nonstop9h 50m

€568

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Tue 25/11

06:30-12:10

1 stop13h 40m

Seattle/Tacoma Intl

Tue 2/12

08:10-08:25

2 stops16h 15m

€570

LondonSeattle

LHR - SEA

LHRSEA

London Heathrow

Mon 24/11

06:30-12:10

1 stop13h 40m

Seattle/Tacoma Intl

Mon 8/12

23:50-21:20

1 stop13h 30m

€596

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

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 €568.

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?

You are more likely to see cheaper flights to Seattle from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around €665 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from London for as low as €623 on momondo.

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

There are 2 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 71% 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 October 2025, prices for London to Seattle flights are approximately 6% 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

Fastest flight time

9h 45m

Direct flights

Every day

Airports in Seattle

1 airport
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)
Search flight deals

  • 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 05m, 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?

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Aberdeen
Lynnwood

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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 28/11
Fri 5/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Airports servicing Washington

Spokane Airport