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Cheap flights from Seattle to London from £201

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 29/9. 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
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Cheap return flights

Icelandair Logo
19:00 - 14:40SEA-LGW
11h 40m1 stop
Icelandair Logo
15:40 - 20:40LGW-SEA
13h 00m1 stop
£372Icelandair
Find Deal
Wed, 1 Oct - Wed, 15 Oct
Icelandair Logo
19:00 - 14:35SEA-LGW
11h 35m1 stop
Icelandair Logo
15:40 - 20:40LGW-SEA
13h 00m1 stop
£374Icelandair
Find Deal
Sat, 4 Oct - Thu, 23 Oct
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
£374Icelandair
Find Deal
Thu, 6 Nov - Wed, 19 Nov
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
£375Icelandair
Find Deal
Thu, 8 Jan - Sun, 11 Jan
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
£376Icelandair
Find Deal
Tue, 18 Nov - Thu, 27 Nov
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
£377Icelandair
Find Deal
Fri, 30 Jan - Thu, 12 Feb
Multiple Airlines Logo
10:00 - 12:20SEA-LGW
18h 20m2 stops
Multiple Airlines Logo
21:35 - 14:16LGW-SEA
24h 41m2 stops
£383Multiple Airlines
Find Deal
Tue, 14 Oct - Tue, 21 Oct
SWISS Logo
15:28 - 17:50SEA-LGW
18h 22m2 stops
SWISS Logo
18:35 - 18:36LGW-SEA
32h 01m2 stops
£385SWISS
Find Deal
Tue, 7 Oct - Wed, 22 Oct
SWISS Logo
13:20 - 17:50SEA-LGW
20h 30m2 stops
SWISS Logo
18:40 - 20:51LGW-SEA
34h 11m2 stops
£391SWISS
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Tue, 11 Nov - Mon, 17 Nov
SWISS Logo
10:58 - 17:50SEA-LGW
22h 52m2 stops
SWISS Logo
18:40 - 22:43LGW-SEA
36h 03m2 stops
£392SWISS
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Tue, 20 Jan - Tue, 27 Jan

Turkish Airlines flights from Seattle to London Gatwick Airport

Our best Turkish Airlines deals on Seattle to London Gatwick Airport flight tickets
Turkish Airlines
28 Sept
SEA19:10Seattle/Tacoma Intl
33h 40m
1 stop
LGW12:50London Gatwick
14 Oct
LGW14:00London Gatwick
35h 15m
1 stop
SEA17:15Seattle/Tacoma Intl
£519
Find similar
Turkish Airlines
24 Sept
SEA19:10Seattle/Tacoma Intl
33h 50m
1 stop
LGW13:00London Gatwick
12 Oct
LGW10:55London Gatwick
38h 20m
1 stop
SEA17:15Seattle/Tacoma Intl
£533
Find similar
Turkish Airlines
28 Sept
SEA19:10Seattle/Tacoma Intl
37h 05m
1 stop
LGW16:15London Gatwick
14 Oct
LGW10:55London Gatwick
38h 20m
1 stop
SEA17:15Seattle/Tacoma Intl
£543
Find similar

Icelandair flights from Seattle to London Gatwick Airport

Our best Icelandair deals on Seattle to London Gatwick Airport flight tickets
Icelandair
1 Oct
SEA19:00Seattle/Tacoma Intl
11h 40m
1 stop
LGW14:40London Gatwick
15 Oct
LGW15:40London Gatwick
13h 00m
1 stop
SEA20:40Seattle/Tacoma Intl
£372
Find similar
Icelandair
4 Oct
SEA19:00Seattle/Tacoma Intl
11h 35m
1 stop
LGW14:35London Gatwick
23 Oct
LGW15:40London Gatwick
13h 00m
1 stop
SEA20:40Seattle/Tacoma Intl
£374
Find similar
Icelandair
6 Nov
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
19 Nov
LGW11:55London Gatwick
13h 05m
1 stop
SEA17:00Seattle/Tacoma Intl
£374
Find similar

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 18 September 2025.
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

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 1/10

19:00-14:40

1 stop11h 40m

London Gatwick

Wed 15/10

15:40-20:40

1 stop13h 00m

£372

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 4/10

19:00-14:35

1 stop11h 35m

London Gatwick

Thu 23/10

15:40-20:40

1 stop13h 00m

£374

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 6/11

14:35-10:55

1 stop12h 20m

London Gatwick

Wed 19/11

11:55-17:00

1 stop13h 05m

£374

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 8/1

14:35-10:55

1 stop12h 20m

London Gatwick

Sun 11/1

11:55-17:00

1 stop13h 05m

£375

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 18/11

14:35-10:55

1 stop12h 20m

London Gatwick

Thu 27/11

11:55-17:00

1 stop13h 05m

£376

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 30/1

14:35-10:55

1 stop12h 20m

London Gatwick

Thu 12/2

11:55-17:00

1 stop13h 05m

£377

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 14/10

10:00-12:20

2 stops18h 20m

London Gatwick

Tue 21/10

21:35-14:16

2 stops24h 41m

£383

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 7/10

15:28-17:50

2 stops18h 22m

London Gatwick

Wed 22/10

18:35-18:36

2 stops32h 01m

£385

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 11/11

13:20-17:50

2 stops20h 30m

London Gatwick

Mon 17/11

18:40-20:51

2 stops34h 11m

£391

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 20/1

10:58-17:50

2 stops22h 52m

London Gatwick

Tue 27/1

18:40-22:43

2 stops36h 03m

£392

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

What is the cheapest month to fly to London Gatwick Airport?

The cheapest month to fly to London Gatwick Airport from Seattle is in January. Flight prices, which tend to average around £408, are often lower during this time because this is during the off-season. If you don’t want to visit London Gatwick Airport in January, then you should wait until April to fly from Seattle, when ticket prices are also cheap, with an average price of £413.

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

Direct flights

None
There are no direct flights from Seattle to London Gatwick Airport. There are no popular flight routes from Seattle to London Gatwick Airport.
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  • 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 35m 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
Luton
Milton Keynes
Maidstone
Gatwick
Slough
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Colchester
Worthing
Chelmsford
Dover
Hayes
Dartford
Winchester
Hounslow
Stansted

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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