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Cheap flights from Seattle to London from £310

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 17/9. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
15:40 - 19:15
SEA
-
LGW
19h 35m
2 stops
Multiple Airlines Logo
20:45 - 17:55
LGW
-
SEA
29h 10m
3 stops
£456Multiple Airlines
Mon, 20 Apr - Mon, 27 Apr
Multiple Airlines Logo
15:40 - 19:15
SEA
-
LGW
19h 35m
2 stops
Multiple Airlines Logo
20:45 - 20:40
LGW
-
SEA
31h 55m
3 stops
£457Multiple Airlines
Mon, 20 Apr - Mon, 27 Apr
Multiple Airlines Logo
15:40 - 19:15
SEA
-
LGW
19h 35m
2 stops
Multiple Airlines Logo
20:45 - 20:40
LGW
-
SEA
31h 55m
3 stops
£458Multiple Airlines
Mon, 20 Apr - Mon, 27 Apr
Multiple Airlines Logo
19:00 - 22:20
SEA
-
LGW
19h 20m
2 stops
Multiple Airlines Logo
06:25 - 20:40
LGW
-
SEA
22h 15m
2 stops
£462Multiple Airlines
Tue, 14 Apr - Tue, 28 Apr
Multiple Airlines Logo
19:00 - 22:20
SEA
-
LGW
19h 20m
2 stops
Multiple Airlines Logo
06:25 - 17:55
LGW
-
SEA
19h 30m
2 stops
£462Multiple Airlines
Tue, 21 Apr - Tue, 28 Apr
Multiple Airlines Logo
19:00 - 22:20
SEA
-
LGW
19h 20m
2 stops
Multiple Airlines Logo
06:25 - 20:40
LGW
-
SEA
22h 15m
2 stops
£463Multiple Airlines
Tue, 14 Apr - Tue, 21 Apr
Multiple Airlines Logo
19:00 - 19:15
SEA
-
LGW
16h 15m
2 stops
Multiple Airlines Logo
08:50 - 18:30
LGW
-
SEA
41h 40m
3 stops
£465Multiple Airlines
Sun, 19 Apr - Tue, 5 May
Multiple Airlines Logo
19:00 - 19:05
SEA
-
LGW
16h 05m
2 stops
Multiple Airlines Logo
09:50 - 19:20
LGW
-
SEA
17h 30m
3 stops
£465Multiple Airlines
Sat, 18 Apr - Sun, 26 Apr
Multiple Airlines Logo
19:00 - 19:15
SEA
-
LGW
16h 15m
2 stops
Multiple Airlines Logo
09:50 - 19:20
LGW
-
SEA
17h 30m
3 stops
£466Multiple Airlines
Sun, 19 Apr - Sun, 26 Apr
Multiple Airlines Logo
19:00 - 19:15
SEA
-
LGW
16h 15m
2 stops
Multiple Airlines Logo
11:00 - 20:40
LGW
-
SEA
17h 40m
2 stops
£470Multiple Airlines
Thu, 16 Apr - Thu, 23 Apr

Delta flights from Seattle to London Gatwick Airport

Our best Delta deals on Seattle to London Gatwick Airport flight tickets
Delta
7 Apr
SEA13:30Seattle/Tacoma Intl
11h 55m
1 stop
LGW09:25London Gatwick
14 Apr
LGW10:35London Gatwick
15h 03m
1 stop
SEA17:38Seattle/Tacoma Intl
£681
Delta
7 Apr
SEA18:40Seattle/Tacoma Intl
13h 20m
1 stop
LGW16:00London Gatwick
20 Apr
LGW10:25London Gatwick
32h 50m
1 stop
SEA11:15Seattle/Tacoma Intl
£691

Condor flights from Seattle to London Gatwick Airport

Our best Condor deals on Seattle to London Gatwick Airport flight tickets
Condor
19 Apr
SEA17:40Seattle/Tacoma Intl
17h 10m
1 stop
LGW18:50London Gatwick
27 Apr
LGW10:20London Gatwick
13h 50m
1 stop
SEA16:10Seattle/Tacoma Intl
£524
Condor
6 Apr
SEA18:10Seattle/Tacoma Intl
16h 40m
1 stop
LGW18:50London Gatwick
13 Apr
LGW10:20London Gatwick
13h 50m
1 stop
SEA16:10Seattle/Tacoma Intl
£638
Condor
30 Mar
SEA18:10Seattle/Tacoma Intl
30h 50m
1 stop
LGW09:00London Gatwick
6 Apr
LGW10:20London Gatwick
13h 50m
1 stop
SEA16:10Seattle/Tacoma Intl
£663

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 24 March 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 - LGW

SEALGW

Seattle/Tacoma Intl

Mon 20/4

15:40-19:15

2 stops19h 35m

London Gatwick

Mon 27/4

20:45-17:55

3 stops29h 10m

£456

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 20/4

15:40-19:15

2 stops19h 35m

London Gatwick

Mon 27/4

20:45-20:40

3 stops31h 55m

£457

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 20/4

15:40-19:15

2 stops19h 35m

London Gatwick

Mon 27/4

20:45-20:40

3 stops31h 55m

£458

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 14/4

19:00-22:20

2 stops19h 20m

London Gatwick

Tue 28/4

06:25-20:40

2 stops22h 15m

£462

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 21/4

19:00-22:20

2 stops19h 20m

London Gatwick

Tue 28/4

06:25-17:55

2 stops19h 30m

£462

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 14/4

19:00-22:20

2 stops19h 20m

London Gatwick

Tue 21/4

06:25-20:40

2 stops22h 15m

£463

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 19/4

19:00-19:15

2 stops16h 15m

London Gatwick

Tue 5/5

08:50-18:30

3 stops41h 40m

£465
Fastest return journey

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 18/4

19:00-19:05

2 stops16h 05m

London Gatwick

Sun 26/4

09:50-19:20

3 stops17h 30m

£465

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 19/4

19:00-19:15

2 stops16h 15m

London Gatwick

Sun 26/4

09:50-19:20

3 stops17h 30m

£466

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 16/4

19:00-19:15

2 stops16h 15m

London Gatwick

Thu 23/4

11:00-20:40

2 stops17h 40m

£470

Flights are sorted by cheapest return flights first.

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

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 November. Flight prices, which tend to average around £388, 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 January to fly from Seattle, when ticket prices are also cheap, with an average price of £405.

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

  • 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
Maidstone
Slough
Southend-on-Sea
Ipswich
Wembley
Canterbury
Ilford
Guildford
Hayes
Chelmsford
Dover
Folkestone
Ramsgate
Chichester
Bedford
Worthing

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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