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Cheap flights from Seattle to London from C$ 460

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 28/8. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 p.m. - 10:55 a.m.
SEA
-
LGW
12h 20m
1 stop
Icelandair Logo
11:55 a.m. - 5:00 p.m.
LGW
-
SEA
13h 05m
1 stop
C$ 1,205Icelandair
Sat, 7 Nov - Wed, 11 Nov
Multiple Airlines Logo
1:30 p.m. - 9:25 a.m.
SEA
-
LGW
11h 55m
1 stop
Multiple Airlines Logo
10:00 a.m. - 4:21 p.m.
LGW
-
SEA
13h 21m
1 stop
C$ 1,210Multiple Airlines
Sun, 18 Oct - Wed, 28 Oct
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$ 1,217Icelandair
Thu, 24 Sep - Mon, 19 Oct
Delta Logo
2:05 p.m. - 3:45 p.m.
SEA
-
LGW
17h 40m
1 stop
Delta Logo
10:00 a.m. - 3:21 p.m.
LGW
-
SEA
13h 21m
1 stop
C$ 1,220Delta
Mon, 2 Nov - Wed, 18 Nov
Delta Logo
1:30 p.m. - 9:25 a.m.
SEA
-
LGW
11h 55m
1 stop
Delta Logo
10:25 a.m. - 5:47 p.m.
LGW
-
SEA
15h 22m
1 stop
C$ 1,222Delta
Sun, 4 Oct - Fri, 16 Oct
SWISS Logo
7:00 a.m. - 8:25 a.m.
SEA
-
LGW
17h 25m
2 stops
SWISS Logo
9:25 a.m. - 6:32 p.m.
LGW
-
SEA
17h 07m
2 stops
C$ 1,223SWISS
Tue, 29 Sep - Wed, 14 Oct
SWISS Logo
7:00 a.m. - 8:25 a.m.
SEA
-
LGW
17h 25m
2 stops
SWISS Logo
9:25 a.m. - 6:32 p.m.
LGW
-
SEA
17h 07m
2 stops
C$ 1,224SWISS
Tue, 22 Sep - Tue, 29 Sep
Delta Logo
10:40 p.m. - 9:25 a.m.
SEA
-
LGW
26h 45m
2 stops
Delta Logo
10:35 a.m. - 5:47 p.m.
LGW
-
SEA
15h 12m
1 stop
C$ 1,227Delta
Sat, 26 Sep - Tue, 20 Oct
Virgin Atlantic Logo
8:25 a.m. - 9:00 a.m.
SEA
-
LGW
16h 35m
2 stops
Virgin Atlantic Logo
10:00 a.m. - 3:21 p.m.
LGW
-
SEA
13h 21m
1 stop
C$ 1,229Virgin Atlantic
Wed, 4 Nov - Wed, 18 Nov
Delta Logo
7:20 a.m. - 4:00 p.m.
SEA
-
LGW
24h 40m
2 stops
Delta Logo
10:25 a.m. - 5:47 p.m.
LGW
-
SEA
15h 22m
1 stop
C$ 1,230Delta
Sat, 10 Oct - Fri, 16 Oct

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Icelandair flights from Seattle to London Gatwick Airport

Our best Icelandair deals on Seattle to London Gatwick Airport flight tickets
Icelandair
7 Nov
SEA2:35 p.m.Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 a.m.London Gatwick
11 Nov
LGW11:55 a.m.London Gatwick
13h 05m
1 stop
SEA5:00 p.m.Seattle/Tacoma Intl
C$ 1,205
Icelandair
24 Sep
SEA7:00 p.m.Seattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 p.m.London Gatwick
19 Oct
LGW3:40 p.m.London Gatwick
34h 15m
1 stop
SEA5:55 p.m.Seattle/Tacoma Intl
C$ 1,217
Icelandair
30 Sep
SEA7:00 p.m.Seattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 p.m.London Gatwick
16 Oct
LGW3:40 p.m.London Gatwick
13h 00m
1 stop
SEA8:40 p.m.Seattle/Tacoma Intl
C$ 1,249

Delta flights from Seattle to London Gatwick Airport

Our best Delta deals on Seattle to London Gatwick Airport flight tickets
Delta
2 Nov
SEA2:05 p.m.Seattle/Tacoma Intl
17h 40m
1 stop
LGW3:45 p.m.London Gatwick
18 Nov
LGW10:00 a.m.London Gatwick
13h 21m
1 stop
SEA3:21 p.m.Seattle/Tacoma Intl
C$ 1,220
Delta
4 Oct
SEA1:30 p.m.Seattle/Tacoma Intl
11h 55m
1 stop
LGW9:25 a.m.London Gatwick
16 Oct
LGW10:25 a.m.London Gatwick
15h 22m
1 stop
SEA5:47 p.m.Seattle/Tacoma Intl
C$ 1,222
Delta
26 Sep
SEA10:40 p.m.Seattle/Tacoma Intl
26h 45m
2 stops
LGW9:25 a.m.London Gatwick
20 Oct
LGW10:35 a.m.London Gatwick
15h 12m
1 stop
SEA5:47 p.m.Seattle/Tacoma Intl
C$ 1,227

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 23 June 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

Sat 7/11

2:35 p.m.-10:55 a.m.

1 stop12h 20m

London Gatwick

Wed 11/11

11:55 a.m.-5:00 p.m.

1 stop13h 05m

C$ 1,205
Quickest round-trip

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 18/10

1:30 p.m.-9:25 a.m.

1 stop11h 55m

London Gatwick

Wed 28/10

10:00 a.m.-4:21 p.m.

1 stop13h 21m

C$ 1,210

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 24/9

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

1 stop11h 40m

London Gatwick

Mon 19/10

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

1 stop34h 15m

C$ 1,217

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 2/11

2:05 p.m.-3:45 p.m.

1 stop17h 40m

London Gatwick

Wed 18/11

10:00 a.m.-3:21 p.m.

1 stop13h 21m

C$ 1,220

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 4/10

1:30 p.m.-9:25 a.m.

1 stop11h 55m

London Gatwick

Fri 16/10

10:25 a.m.-5:47 p.m.

1 stop15h 22m

C$ 1,222

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 29/9

7:00 a.m.-8:25 a.m.

2 stops17h 25m

London Gatwick

Wed 14/10

9:25 a.m.-6:32 p.m.

2 stops17h 07m

C$ 1,223

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 22/9

7:00 a.m.-8:25 a.m.

2 stops17h 25m

London Gatwick

Tue 29/9

9:25 a.m.-6:32 p.m.

2 stops17h 07m

C$ 1,224

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 26/9

10:40 p.m.-9:25 a.m.

2 stops26h 45m

London Gatwick

Tue 20/10

10:35 a.m.-5:47 p.m.

1 stop15h 12m

C$ 1,227

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 4/11

8:25 a.m.-9:00 a.m.

2 stops16h 35m

London Gatwick

Wed 18/11

10:00 a.m.-3:21 p.m.

1 stop13h 21m

C$ 1,229

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 10/10

7:20 a.m.-4:00 p.m.

2 stops24h 40m

London Gatwick

Fri 16/10

10:25 a.m.-5:47 p.m.

1 stop15h 22m

C$ 1,230

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

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

If you are unable to visit London Gatwick Airport during the month of August, then departing from Seattle during the month November is also very affordable. Most momondo users find prices during this month for around C$ 736.

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

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?

    Seattle/Tacoma Intl and London Gatwick are 7722.7 km apart from one another. A reasonable flight in good conditions will take 11h 40m.

  • 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
Milton Keynes
Wembley
Slough
Gatwick
Ramsgate
Wokingham
Crawley
Hayes
Feltham
Richmond
Chelmsford
Waterlooville
Basingstoke
Woking
Enfield
Dover
Worthing
Ipswich
Luton

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

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