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Cheap flights from Seattle to London from C$ 628

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 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:40 p.m. - 7:15 p.m.
SEA
-
LGW
19h 35m
2 stops
Multiple Airlines Logo
8:45 p.m. - 5:55 p.m.
LGW
-
SEA
29h 10m
3 stops
C$ 837Multiple Airlines
Mon, 20 Apr - Mon, 27 Apr
Multiple Airlines Logo
7:00 p.m. - 10:20 p.m.
SEA
-
LGW
19h 20m
2 stops
Multiple Airlines Logo
6:25 a.m. - 5:55 p.m.
LGW
-
SEA
19h 30m
2 stops
C$ 848Multiple Airlines
Tue, 21 Apr - Tue, 28 Apr
Icelandair Logo
3:40 p.m. - 2:40 p.m.
SEA
-
LGW
15h 00m
1 stop
Icelandair Logo
3:40 p.m. - 5:55 p.m.
LGW
-
SEA
34h 15m
1 stop
C$ 974Icelandair
Mon, 20 Apr - Mon, 27 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
1:00 p.m. - 5:55 p.m.
LGW
-
SEA
12h 55m
1 stop
C$ 980Icelandair
Tue, 21 Apr - Tue, 28 Apr
Multiple Airlines Logo
7:00 p.m. - 8:20 p.m.
SEA
-
LGW
17h 20m
2 stops
Multiple Airlines Logo
8:45 a.m. - 8:40 p.m.
LGW
-
SEA
19h 55m
2 stops
C$ 981Multiple Airlines
Mon, 20 Apr - Mon, 27 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
3:40 p.m. - 5:55 p.m.
LGW
-
SEA
34h 15m
1 stop
C$ 998Icelandair
Thu, 16 Apr - Thu, 23 Apr
Icelandair Logo
3:40 p.m. - 11:45 a.m.
SEA
-
LGW
12h 05m
1 stop
Icelandair Logo
3:40 p.m. - 8:40 p.m.
LGW
-
SEA
13h 00m
1 stop
C$ 999Icelandair
Wed, 19 Aug - Wed, 2 Sep
Icelandair Logo
3:40 p.m. - 2:40 p.m.
SEA
-
LGW
15h 00m
1 stop
Icelandair Logo
3:40 p.m. - 8:40 p.m.
LGW
-
SEA
13h 00m
1 stop
C$ 1,000Icelandair
Wed, 19 Aug - Wed, 2 Sep
Icelandair Logo
7:00 p.m. - 2:40 p.m.
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
3:40 p.m. - 8:40 p.m.
LGW
-
SEA
13h 00m
1 stop
C$ 1,011Icelandair
Fri, 24 Apr - Mon, 27 Apr
Multiple Airlines Logo
7:00 p.m. - 12:55 p.m.
SEA
-
LGW
33h 55m
3 stops
Multiple Airlines Logo
7:25 a.m. - 5:55 p.m.
LGW
-
SEA
18h 30m
2 stops
C$ 1,020Multiple 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
9 Aug
SEA1:30 p.m.Seattle/Tacoma Intl
11h 55m
1 stop
LGW9:25 a.m.London Gatwick
26 Aug
LGW10:25 a.m.London Gatwick
15h 09m
1 stop
SEA5:34 p.m.Seattle/Tacoma Intl
C$ 1,113
Delta
19 Apr
SEA10:40 p.m.Seattle/Tacoma Intl
27h 00m
2 stops
LGW9:40 a.m.London Gatwick
28 Apr
LGW10:35 a.m.London Gatwick
15h 03m
1 stop
SEA5:38 p.m.Seattle/Tacoma Intl
C$ 1,118
Delta
10 Aug
SEA7:20 a.m.Seattle/Tacoma Intl
42h 05m
2 stops
LGW9:25 a.m.London Gatwick
26 Aug
LGW10:25 a.m.London Gatwick
15h 09m
1 stop
SEA5:34 p.m.Seattle/Tacoma Intl
C$ 1,121

Turkish Airlines flights from Seattle to London Gatwick Airport

Our best Turkish Airlines deals on Seattle to London Gatwick Airport flight tickets
Turkish Airlines
12 May
SEA7:10 p.m.Seattle/Tacoma Intl
19h 15m
1 stop
LGW10:25 p.m.London Gatwick
18 May
LGW7:05 a.m.London Gatwick
18h 10m
1 stop
SEA5:15 p.m.Seattle/Tacoma Intl
C$ 1,110
Turkish Airlines
31 Mar
SEA8:42 a.m.Seattle/Tacoma Intl
29h 43m
2 stops
LGW10:25 p.m.London Gatwick
23 Apr
LGW2:05 p.m.London Gatwick
35h 10m
1 stop
SEA5:15 p.m.Seattle/Tacoma Intl
C$ 1,275
Turkish Airlines
6 Apr
SEA7:10 p.m.Seattle/Tacoma Intl
19h 15m
1 stop
LGW10:25 p.m.London Gatwick
14 Apr
LGW5:35 p.m.London Gatwick
35h 22m
2 stops
SEA8:57 p.m.Seattle/Tacoma Intl
C$ 1,282

momondo Fare Finder

 
Customize 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 96,600 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 round-trip

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 20/4

3:40 p.m.-7:15 p.m.

2 stops19h 35m

London Gatwick

Mon 27/4

8:45 p.m.-5:55 p.m.

3 stops29h 10m

C$ 837

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 21/4

7:00 p.m.-10:20 p.m.

2 stops19h 20m

London Gatwick

Tue 28/4

6:25 a.m.-5:55 p.m.

2 stops19h 30m

C$ 848

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 20/4

3:40 p.m.-2:40 p.m.

1 stop15h 00m

London Gatwick

Mon 27/4

3:40 p.m.-5:55 p.m.

1 stop34h 15m

C$ 974
Quickest round-trip

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 21/4

7:00 p.m.-2:40 p.m.

1 stop11h 40m

London Gatwick

Tue 28/4

1:00 p.m.-5:55 p.m.

1 stop12h 55m

C$ 980

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 20/4

7:00 p.m.-8:20 p.m.

2 stops17h 20m

London Gatwick

Mon 27/4

8:45 a.m.-8:40 p.m.

2 stops19h 55m

C$ 981

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 16/4

7:00 p.m.-2:40 p.m.

1 stop11h 40m

London Gatwick

Thu 23/4

3:40 p.m.-5:55 p.m.

1 stop34h 15m

C$ 998

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 19/8

3:40 p.m.-11:45 a.m.

1 stop12h 05m

London Gatwick

Wed 2/9

3:40 p.m.-8:40 p.m.

1 stop13h 00m

C$ 999

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 19/8

3:40 p.m.-2:40 p.m.

1 stop15h 00m

London Gatwick

Wed 2/9

3:40 p.m.-8:40 p.m.

1 stop13h 00m

C$ 1,000

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 24/4

7:00 p.m.-2:40 p.m.

1 stop11h 40m

London Gatwick

Mon 27/4

3:40 p.m.-8:40 p.m.

1 stop13h 00m

C$ 1,011

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 16/4

7:00 p.m.-12:55 p.m.

3 stops33h 55m

London Gatwick

Thu 23/4

7:25 a.m.-5:55 p.m.

2 stops18h 30m

C$ 1,020

Flights are sorted by cheapest round-trip 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?

If you are unable to visit London Gatwick Airport during the month of November, then departing from Seattle during the month January is also very affordable. Most momondo users find prices during this month for around C$ 742.

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 round-trip 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

19h 15m

Direct flights

None
The fastest flight from Seattle to London Gatwick Airport takes 19h 15m
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?

    Seattle/Tacoma Intl and London Gatwick are 7722.7 km apart from one another. A reasonable flight in good conditions will take 19h 15m.

  • 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 updated daily.

  • 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
Hounslow
Wembley
Ilford
Slough
Gatwick
Wokingham
Crawley
Feltham
Hayes
Waterlooville
Newport
Chelmsford
Basingstoke
Milton Keynes
Dover
Worthing
Guildford
Ipswich
Maidstone
Woking

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to London for you.

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

All flight searches from Seattle to London on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Seattle to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Seattle and alert you when they change.

An easier way to manage your London Gatwick Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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