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Cheap flights from Seattle to London from £273

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 14/5. 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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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
15:40 - 17:55
LGW
-
SEA
34h 15m
1 stop
£395Icelandair
Mon, 13 Apr - Wed, 22 Apr
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£396Icelandair
Mon, 13 Apr - Mon, 20 Apr
Icelandair Logo
14:35 - 10:55
SEA
-
LGW
12h 20m
1 stop
Icelandair Logo
15:40 - 17:55
LGW
-
SEA
34h 15m
1 stop
£397Icelandair
Mon, 2 Mar - Wed, 1 Apr
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£397Icelandair
Mon, 13 Apr - Sat, 25 Apr
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£399Icelandair
Sun, 12 Apr - Mon, 20 Apr
Icelandair Logo
14:35 - 10:55
SEA
-
LGW
12h 20m
1 stop
Icelandair Logo
11:55 - 17:00
LGW
-
SEA
13h 05m
1 stop
£401Icelandair
Mon, 23 Feb - Tue, 3 Mar
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
15:40 - 20:40
LGW
-
SEA
13h 00m
1 stop
£402Icelandair
Wed, 29 Apr - Mon, 11 May
Icelandair Logo
19:00 - 14:40
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
15:40 - 17:55
LGW
-
SEA
34h 15m
1 stop
£403Icelandair
Thu, 23 Apr - Sun, 10 May
Icelandair Logo
15:40 - 14:40
SEA
-
LGW
15h 00m
1 stop
Icelandair Logo
13:00 - 17:55
LGW
-
SEA
12h 55m
1 stop
£403Icelandair
Wed, 29 Apr - Thu, 7 May
Multiple Airlines Logo
15:35 - 17:15
SEA
-
LGW
18h 40m
2 stops
Multiple Airlines Logo
09:40 - 20:40
LGW
-
SEA
19h 00m
2 stops
£404Multiple Airlines
Tue, 24 Mar - Tue, 31 Mar

Icelandair flights from Seattle to London Gatwick Airport

Our best Icelandair deals on Seattle to London Gatwick Airport flight tickets
Icelandair
13 Apr
SEA19:00Seattle/Tacoma Intl
11h 40m
1 stop
LGW14:40London Gatwick
22 Apr
LGW15:40London Gatwick
34h 15m
1 stop
SEA17:55Seattle/Tacoma Intl
£395
Icelandair
13 Apr
SEA15:40Seattle/Tacoma Intl
15h 00m
1 stop
LGW14:40London Gatwick
21 Apr
LGW15:40London Gatwick
13h 00m
1 stop
SEA20:40Seattle/Tacoma Intl
£396
Icelandair
2 Mar
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
1 Apr
LGW15:40London Gatwick
34h 15m
1 stop
SEA17:55Seattle/Tacoma Intl
£397

Turkish Airlines flights from Seattle to London Gatwick Airport

Our best Turkish Airlines deals on Seattle to London Gatwick Airport flight tickets
Turkish Airlines
18 Feb
SEA19:00Seattle/Tacoma Intl
19h 35m
1 stop
LGW22:35London Gatwick
27 Feb
LGW17:05London Gatwick
32h 00m
1 stop
SEA17:05Seattle/Tacoma Intl
£528
Turkish Airlines
18 Feb
SEA19:00Seattle/Tacoma Intl
30h 20m
1 stop
LGW09:20London Gatwick
28 Feb
LGW06:15London Gatwick
18h 50m
1 stop
SEA17:05Seattle/Tacoma Intl
£552
Turkish Airlines
7 Feb
SEA19:00Seattle/Tacoma Intl
30h 25m
1 stop
LGW09:25London Gatwick
11 Feb
LGW17:05London Gatwick
32h 00m
1 stop
SEA17:05Seattle/Tacoma Intl
£600

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 4 February 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

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 13/4

19:00-14:40

1 stop11h 40m

London Gatwick

Wed 22/4

15:40-17:55

1 stop34h 15m

£395

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 13/4

19:00-14:40

1 stop11h 40m

London Gatwick

Mon 20/4

15:40-20:40

1 stop13h 00m

£396

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 2/3

14:35-10:55

1 stop12h 20m

London Gatwick

Wed 1/4

15:40-17:55

1 stop34h 15m

£397

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 13/4

19:00-14:40

1 stop11h 40m

London Gatwick

Sat 25/4

15:40-20:40

1 stop13h 00m

£397

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 12/4

19:00-14:40

1 stop11h 40m

London Gatwick

Mon 20/4

15:40-20:40

1 stop13h 00m

£399

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 23/2

14:35-10:55

1 stop12h 20m

London Gatwick

Tue 3/3

11:55-17:00

1 stop13h 05m

£401

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 29/4

19:00-14:40

1 stop11h 40m

London Gatwick

Mon 11/5

15:40-20:40

1 stop13h 00m

£402

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 23/4

19:00-14:40

1 stop11h 40m

London Gatwick

Sun 10/5

15:40-17:55

1 stop34h 15m

£403

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 29/4

15:40-14:40

1 stop15h 00m

London Gatwick

Thu 7/5

13:00-17:55

1 stop12h 55m

£403

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 24/3

15:35-17:15

2 stops18h 40m

London Gatwick

Tue 31/3

09:40-20:40

2 stops19h 00m

£404

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 £379, 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 £395.

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
Canterbury
Ipswich
Ilford
Guildford
Chelmsford
Hayes
Dover
Folkestone
Bedford
Colchester
Wembley
Worthing
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

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