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Cheap flights from Seattle to London from £342

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 5/7. 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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0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
13:00 - 17:55
LGW
-
SEA
12h 55m
1 stop
£608Icelandair
Mon, 17 Aug - Tue, 25 Aug
Icelandair Logo
23:25 - 11:45
SEA
-
LGW
28h 20m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£612Icelandair
Fri, 7 Aug - Thu, 20 Aug
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£617Icelandair
Sun, 11 Oct - Fri, 23 Oct
Condor Logo
18:10 - 18:50
SEA
-
LGW
16h 40m
1 stop
Condor Logo
19:50 - 16:35
LGW
-
SEA
27h 45m
1 stop
£618Condor
Mon, 19 Oct - Wed, 28 Oct
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
15:40 - 17:55
LGW
-
SEA
34h 15m
1 stop
£618Icelandair
Mon, 12 Oct - Mon, 19 Oct
Multiple Airlines Logo
15:40 - 19:15
SEA
-
LGW
19h 35m
2 stops
Multiple Airlines Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£619Multiple Airlines
Mon, 21 Sep - Sun, 27 Sep
Multiple Airlines Logo
15:40 - 19:15
SEA
-
LGW
19h 35m
2 stops
Multiple Airlines Logo
08:55 - 18:45
LGW
-
SEA
41h 50m
3 stops
£620Multiple Airlines
Mon, 21 Sep - Sun, 27 Sep
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£620Icelandair
Sat, 26 Sep - Mon, 5 Oct
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£621Icelandair
Sat, 12 Sep - Sun, 4 Oct
Icelandair Logo
15:40 - 11:45
SEA
-
LGW
12h 05m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£622Icelandair
Mon, 7 Sep - Thu, 8 Oct

Icelandair flights from Seattle to London Gatwick Airport

Our best Icelandair deals on Seattle to London Gatwick Airport flight tickets
Icelandair
17 Aug
SEA19:00Seattle/Tacoma Intl
11h 40m
1 stop
LGW14:40London Gatwick
25 Aug
LGW13:00London Gatwick
12h 55m
1 stop
SEA17:55Seattle/Tacoma Intl
£608
Icelandair
7 Aug
SEA23:25Seattle/Tacoma Intl
28h 20m
1 stop
LGW11:45London Gatwick
20 Aug
LGW15:40London Gatwick
13h 00m
1 stop
SEA20:40Seattle/Tacoma Intl
£612
Icelandair
11 Oct
SEA19:00Seattle/Tacoma Intl
11h 40m
1 stop
LGW14:40London Gatwick
23 Oct
LGW15:40London Gatwick
13h 00m
1 stop
SEA20:40Seattle/Tacoma Intl
£617

Condor flights from Seattle to London Gatwick Airport

Our best Condor deals on Seattle to London Gatwick Airport flight tickets
Condor
19 Oct
SEA18:10Seattle/Tacoma Intl
16h 40m
1 stop
LGW18:50London Gatwick
28 Oct
LGW19:50London Gatwick
27h 45m
1 stop
SEA16:35Seattle/Tacoma Intl
£618
Condor
14 Oct
SEA17:40Seattle/Tacoma Intl
13h 05m
1 stop
LGW14:45London Gatwick
18 Oct
LGW10:20London Gatwick
13h 20m
1 stop
SEA15:40Seattle/Tacoma Intl
£624
Condor
13 Oct
SEA18:05Seattle/Tacoma Intl
16h 45m
1 stop
LGW18:50London Gatwick
18 Oct
LGW10:20London Gatwick
13h 20m
1 stop
SEA15:40Seattle/Tacoma Intl
£628

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 10 May 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
Fastest return journey

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 17/8

19:00-14:40

1 stop11h 40m

London Gatwick

Tue 25/8

13:00-17:55

1 stop12h 55m

£608

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 7/8

23:25-11:45

1 stop28h 20m

London Gatwick

Thu 20/8

15:40-20:40

1 stop13h 00m

£612

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 11/10

19:00-14:40

1 stop11h 40m

London Gatwick

Fri 23/10

15:40-20:40

1 stop13h 00m

£617

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 19/10

18:10-18:50

1 stop16h 40m

London Gatwick

Wed 28/10

19:50-16:35

1 stop27h 45m

£618

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 12/10

19:00-14:40

1 stop11h 40m

London Gatwick

Mon 19/10

15:40-17:55

1 stop34h 15m

£618

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 21/9

15:40-19:15

2 stops19h 35m

London Gatwick

Sun 27/9

15:40-20:40

1 stop13h 00m

£619

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 21/9

15:40-19:15

2 stops19h 35m

London Gatwick

Sun 27/9

08:55-18:45

3 stops41h 50m

£620

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 26/9

19:00-14:40

1 stop11h 40m

London Gatwick

Mon 5/10

15:40-20:40

1 stop13h 00m

£620

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 12/9

19:00-14:40

1 stop11h 40m

London Gatwick

Sun 4/10

15:40-20:40

1 stop13h 00m

£621

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 7/9

15:40-11:45

1 stop12h 05m

London Gatwick

Thu 8/10

15:40-20:40

1 stop13h 00m

£622

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 November. Flight prices, which tend to average around £381, are often lower during this time because this is during the off-season. If you don’t want to visit London Gatwick Airport in November, then you should wait until August to fly from Seattle, when ticket prices are also cheap, with an average price of £389.

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
Milton Keynes
Luton
Gatwick
Wembley
Slough
Maidstone
Ipswich
Southend-on-Sea
Canterbury
Ilford
Hayes
Guildford
Folkestone
Chelmsford
Dover
Chichester
Bedford
Harlow
Ramsgate

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

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.
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