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Cheap flights from Seattle to London from £209

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to London departing on 13/10. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
19:00 - 08:40SEA  Seattle/Tacoma Intl-LGW London Gatwick
29h 40m3 stops Reykjavik Keflavik Intl Stockholm Arlanda Oslo Gardermoen
Multiple Airlines Logo
11:00 - 11:45LGW  London Gatwick-SEA Seattle/Tacoma Intl
32h 45m2 stops Stockholm Arlanda Reykjavik Keflavik Intl
£473Multiple Airlines
Sun, 16 Aug - Wed, 26 Aug
Icelandair Logo
14:35 - 10:55SEA  Seattle/Tacoma Intl-LGW London Gatwick
12h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
11:55 - 17:00LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 05m1 stop Reykjavik Keflavik Intl
£477Icelandair
Thu, 19 Nov - Wed, 2 Dec
Multiple Airlines Logo
15:40 - 19:15SEA  Seattle/Tacoma Intl-LGW London Gatwick
19h 35m2 stops Reykjavik Keflavik Intl Stockholm Arlanda
Multiple Airlines Logo
20:45 - 17:55LGW  London Gatwick-SEA Seattle/Tacoma Intl
29h 10m3 stops Kastrup Copenhagen Stockholm Arlanda Reykjavik Keflavik Intl
£479Multiple Airlines
Wed, 30 Sep - Wed, 7 Oct
Icelandair Logo
14:35 - 10:55SEA  Seattle/Tacoma Intl-LGW London Gatwick
12h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
11:55 - 17:00LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 05m1 stop Reykjavik Keflavik Intl
£479Icelandair
Sun, 15 Nov - Wed, 2 Dec
Icelandair Logo
14:35 - 10:55SEA  Seattle/Tacoma Intl-LGW London Gatwick
12h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
11:55 - 17:00LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 05m1 stop Reykjavik Keflavik Intl
£480Icelandair
Tue, 17 Nov - Wed, 2 Dec
Multiple Airlines Logo
08:00 - 19:05SEA  Seattle/Tacoma Intl-LGW London Gatwick
27h 05m3 stops Toronto Pearson Intl Vienna Intl Oslo Gardermoen
Multiple Airlines Logo
17:40 - 13:00LGW  London Gatwick-SEA Seattle/Tacoma Intl
26h 20m2 stops Oslo Gardermoen Frankfurt am Main
£481Multiple Airlines
Wed, 21 Oct - Wed, 28 Oct
Multiple Airlines Logo
15:55 - 18:25SEA  Seattle/Tacoma Intl-LGW London Gatwick
18h 30m1 stop Kastrup Copenhagen
Multiple Airlines Logo
18:25 - 13:45LGW  London Gatwick-SEA Seattle/Tacoma Intl
27h 20m2 stops Barcelona-El Prat Kastrup Copenhagen
£481Multiple Airlines
Tue, 6 Oct - Fri, 9 Oct
Multiple Airlines Logo
14:10 - 20:10SEA  Seattle/Tacoma Intl-LGW London Gatwick
22h 00m2 stops Frankfurt am Main Oslo Gardermoen
Multiple Airlines Logo
20:50 - 16:59LGW  London Gatwick-SEA Seattle/Tacoma Intl
28h 09m2 stops Oslo Gardermoen Munich Franz Josef Strauss
£483Multiple Airlines
Tue, 22 Sep - Tue, 6 Oct
Multiple Airlines Logo
14:10 - 20:10SEA  Seattle/Tacoma Intl-LGW London Gatwick
22h 00m2 stops Frankfurt am Main Oslo Gardermoen
Multiple Airlines Logo
20:50 - 12:20LGW  London Gatwick-SEA Seattle/Tacoma Intl
23h 30m2 stops Oslo Gardermoen Frankfurt am Main
£485Multiple Airlines
Tue, 22 Sep - Tue, 6 Oct
Multiple Airlines Logo
08:00 - 19:15SEA  Seattle/Tacoma Intl-LGW London Gatwick
27h 15m3 stops Toronto Pearson Intl Vienna Intl Stockholm Arlanda
Multiple Airlines Logo
19:55 - 14:22LGW  London Gatwick-SEA Seattle/Tacoma Intl
26h 27m3 stops Stockholm Arlanda Frankfurt am Main Vancouver Intl
£488Multiple Airlines
Mon, 7 Sep - Mon, 21 Sep

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Icelandair flights from Seattle to London Gatwick Airport

Our best Icelandair deals on Seattle to London Gatwick Airport flight tickets
Icelandair
19 Nov
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
2 Dec
LGW11:55London Gatwick
13h 05m
1 stop
SEA17:00Seattle/Tacoma Intl
£477
Icelandair
17 Nov
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
2 Dec
LGW11:55London Gatwick
13h 05m
1 stop
SEA17:00Seattle/Tacoma Intl
£480
Icelandair
6 Oct
SEA19:00Seattle/Tacoma Intl
11h 40m
1 stop
LGW14:40London Gatwick
13 Oct
LGW15:40London Gatwick
13h 00m
1 stop
SEA20:40Seattle/Tacoma Intl
£522

Condor flights from Seattle to London Gatwick Airport

Our best Condor deals on Seattle to London Gatwick Airport flight tickets
Condor
18 Aug
SEA18:05Seattle/Tacoma Intl
16h 45m
1 stop
LGW18:50London Gatwick
30 Sept
LGW10:20London Gatwick
13h 20m
1 stop
SEA15:40Seattle/Tacoma Intl
£594
Condor
18 Aug
SEA18:05Seattle/Tacoma Intl
16h 45m
1 stop
LGW18:50London Gatwick
2 Sept
LGW10:20London Gatwick
13h 20m
1 stop
SEA15:40Seattle/Tacoma Intl
£602
Condor
18 Aug
SEA18:05Seattle/Tacoma Intl
16h 45m
1 stop
LGW18:50London Gatwick
30 Sept
LGW10:20London Gatwick
13h 20m
1 stop
SEA15:40Seattle/Tacoma Intl
£605

momondo Fare Finder

 
Customise your flight search to find flights from Seattle to London Gatwick Airport 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 279,928 searches. Data last updated 5 August 2026.
Use the filters below to find and compare flights from Seattle to London Gatwick Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Sun 16/8

19:00-08:40

3 stops29h 40m

London Gatwick

Wed 26/8

11:00-11:45

2 stops32h 45m

£473
Fastest return journey

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Thu 19/11

14:35-10:55

1 stop12h 20m

London Gatwick

Wed 2/12

11:55-17:00

1 stop13h 05m

£477

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Wed 30/9

15:40-19:15

2 stops19h 35m

London Gatwick

Wed 7/10

20:45-17:55

3 stops29h 10m

£479

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Sun 15/11

14:35-10:55

1 stop12h 20m

London Gatwick

Wed 2/12

11:55-17:00

1 stop13h 05m

£479

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Tue 17/11

14:35-10:55

1 stop12h 20m

London Gatwick

Wed 2/12

11:55-17:00

1 stop13h 05m

£480

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Wed 21/10

08:00-19:05

3 stops27h 05m

London Gatwick

Wed 28/10

17:40-13:00

2 stops26h 20m

£481

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Tue 6/10

15:55-18:25

1 stop18h 30m

London Gatwick

Fri 9/10

18:25-13:45

2 stops27h 20m

£481

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Tue 22/9

14:10-20:10

2 stops22h 00m

London Gatwick

Tue 6/10

20:50-16:59

2 stops28h 09m

£483

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Tue 22/9

14:10-20:10

2 stops22h 00m

London Gatwick

Tue 6/10

20:50-12:20

2 stops23h 30m

£485

SeattleLondon

SEA Seattle/Tacoma Intl - LGW London Gatwick

SEALGW

Seattle/Tacoma Intl

Mon 7/9

08:00-19:15

3 stops27h 15m

London Gatwick

Mon 21/9

19:55-14:22

3 stops26h 27m

£488

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Seattle to London Gatwick Airport

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 London Gatwick Airport?

The cheapest month to fly to London Gatwick Airport from Seattle is in August. Flight prices, which tend to average around £0, are often lower during this time because this is during the off-season. If you don’t want to visit London Gatwick Airport in August, then you should wait until November to fly from Seattle, when ticket prices are also cheap, with an average price of £386.

When to book flights from Seattle to London Gatwick Airport

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

Cheap Seattle to London Gatwick Airport (SEA to LGW) flight deals and tips

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

Fastest flight time

11h 40m

Direct flights

None
The fastest flight from Seattle to London Gatwick Airport takes 11h 40m
There are no direct flights from Seattle to London Gatwick Airport. There are no popular flight routes from Seattle to London Gatwick Airport.
Search flight deals

Frequently asked questions about flying from Seattle to London Gatwick Airport

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

    The straight-line distance from Seattle/Tacoma Intl to London Gatwick is 4798.7 mi. 11h 40m is a normal flight duration for this route.

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

    Prices for flights from Seattle/Tacoma Intl Airport to London Gatwick Airport are refreshed on a daily basis.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London Gatwick Airport.

  • What documentation or ID do you need to fly to London Gatwick Airport?

    The travel and health documents you'll need for your trip to London Gatwick 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 license and a passport that is valid for six months after your intended arrival at London Gatwick Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Wembley
Gatwick
Milton Keynes
Luton
Southend-on-Sea
Slough
Ipswich
Maidstone
Folkestone
Ilford
Hastings
Canterbury
Guildford
Chichester
Hayes
Bedford
Harlow
Colchester
Chelmsford

Why use momondo?

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

It is quick and easy to find Seattle to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Yes. momondo allows you to filter the results for Seattle to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to London.

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

Yes momondo offers price alerts on flights to London from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London Gatwick Airport trip

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