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Cheap flights from Seattle to London from C$ 389

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 1/11. 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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Find the cheapest flights from Seattle to London

Cheap round-trip flights

Icelandair Logo
7:00 p.m. - 2:40 p.m.SEA-LGW
11h 40m1 stop
Icelandair Logo
3:40 p.m. - 8:40 p.m.LGW-SEA
13h 00m1 stop
C$ 699Icelandair
Find Deal
Wed, 1 Oct - Wed, 15 Oct
Icelandair Logo
2:35 p.m. - 10:55 a.m.SEA-LGW
12h 20m1 stop
Icelandair Logo
3:40 p.m. - 9:10 p.m.LGW-SEA
13h 30m1 stop
C$ 703Icelandair
Find Deal
Fri, 6 Mar - Sun, 29 Mar
Icelandair Logo
2:35 p.m. - 10:55 a.m.SEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 a.m. - 5:00 p.m.LGW-SEA
13h 05m1 stop
C$ 713Icelandair
Find Deal
Mon, 3 Nov - Sun, 23 Nov
Icelandair Logo
2:35 p.m. - 10:55 a.m.SEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 a.m. - 5:00 p.m.LGW-SEA
13h 05m1 stop
C$ 714Icelandair
Find Deal
Sun, 18 Jan - Sun, 25 Jan
Icelandair Logo
2:35 p.m. - 10:55 a.m.SEA-LGW
12h 20m1 stop
Icelandair Logo
3:40 p.m. - 9:10 p.m.LGW-SEA
13h 30m1 stop
C$ 736Icelandair
Find Deal
Tue, 3 Mar - Wed, 1 Apr
Icelandair Logo
2:35 p.m. - 10:55 a.m.SEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 a.m. - 5:00 p.m.LGW-SEA
13h 05m1 stop
C$ 747Icelandair
Find Deal
Mon, 17 Nov - Tue, 2 Dec
Multiple Airlines Logo
7:55 a.m. - 6:20 a.m.SEA-LGW
14h 25m1 stop
Multiple Airlines Logo
1:00 p.m. - 10:25 a.m.LGW-SEA
29h 25m1 stop
C$ 867Multiple Airlines
Find Deal
Tue, 21 Oct - Sun, 16 Nov
Turkish Airlines Logo
12:30 p.m. - 9:55 a.m.SEA-LGW
37h 25m1 stop
Turkish Airlines Logo
5:30 a.m. - 10:35 a.m.LGW-SEA
37h 05m1 stop
C$ 1,050Turkish Airlines
Find Deal
Thu, 2 Oct - Fri, 17 Oct
Turkish Airlines Logo
7:00 p.m. - 10:35 p.m.SEA-LGW
19h 35m1 stop
Turkish Airlines Logo
10:05 a.m. - 6:05 p.m.LGW-SEA
39h 00m1 stop
C$ 1,077Turkish Airlines
Find Deal
Thu, 5 Mar - Fri, 27 Mar
Turkish Airlines Logo
12:30 p.m. - 10:20 p.m.SEA-LGW
25h 50m1 stop
Turkish Airlines Logo
5:15 p.m. - 10:35 a.m.LGW-SEA
25h 20m1 stop
C$ 1,099Turkish Airlines
Find Deal
Tue, 30 Sep - Mon, 6 Oct

Icelandair flights from Seattle to London Gatwick Airport

Our best Icelandair deals on Seattle to London Gatwick Airport flight tickets
Icelandair
1 Oct
SEA7:00 p.m.Seattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 p.m.London Gatwick
15 Oct
LGW3:40 p.m.London Gatwick
13h 00m
1 stop
SEA8:40 p.m.Seattle/Tacoma Intl
C$ 699
Find similar
Icelandair
6 Mar
SEA2:35 p.m.Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 a.m.London Gatwick
29 Mar
LGW3:40 p.m.London Gatwick
13h 30m
1 stop
SEA9:10 p.m.Seattle/Tacoma Intl
C$ 703
Find similar
Icelandair
3 Nov
SEA2:35 p.m.Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 a.m.London Gatwick
23 Nov
LGW11:55 a.m.London Gatwick
13h 05m
1 stop
SEA5:00 p.m.Seattle/Tacoma Intl
C$ 713
Find similar

Turkish Airlines flights from Seattle to London Gatwick Airport

Our best Turkish Airlines deals on Seattle to London Gatwick Airport flight tickets
Turkish Airlines
2 Oct
SEA12:30 p.m.Seattle/Tacoma Intl
37h 25m
1 stop
LGW9:55 a.m.London Gatwick
17 Oct
LGW5:30 a.m.London Gatwick
37h 05m
1 stop
SEA10:35 a.m.Seattle/Tacoma Intl
C$ 1,050
Find similar
Turkish Airlines
5 Mar
SEA7:00 p.m.Seattle/Tacoma Intl
19h 35m
1 stop
LGW10:35 p.m.London Gatwick
27 Mar
LGW10:05 a.m.London Gatwick
39h 00m
1 stop
SEA6:05 p.m.Seattle/Tacoma Intl
C$ 1,077
Find similar
Turkish Airlines
30 Sep
SEA12:30 p.m.Seattle/Tacoma Intl
25h 50m
1 stop
LGW10:20 p.m.London Gatwick
6 Oct
LGW5:15 p.m.London Gatwick
25h 20m
1 stop
SEA10:35 a.m.Seattle/Tacoma Intl
C$ 1,099
Find similar

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 17 September 2025.
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

Wed 1/10

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

1 stop11h 40m

London Gatwick

Wed 15/10

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

1 stop13h 00m

C$ 699

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 6/3

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

1 stop12h 20m

London Gatwick

Sun 29/3

3:40 p.m.-9:10 p.m.

1 stop13h 30m

C$ 703

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 3/11

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

1 stop12h 20m

London Gatwick

Sun 23/11

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

1 stop13h 05m

C$ 713

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 18/1

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

1 stop12h 20m

London Gatwick

Sun 25/1

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

1 stop13h 05m

C$ 714

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 3/3

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

1 stop12h 20m

London Gatwick

Wed 1/4

3:40 p.m.-9:10 p.m.

1 stop13h 30m

C$ 736

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 17/11

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

1 stop12h 20m

London Gatwick

Tue 2/12

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

1 stop13h 05m

C$ 747

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 21/10

7:55 a.m.-6:20 a.m.

1 stop14h 25m

London Gatwick

Sun 16/11

1:00 p.m.-10:25 a.m.

1 stop29h 25m

C$ 867

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 2/10

12:30 p.m.-9:55 a.m.

1 stop37h 25m

London Gatwick

Fri 17/10

5:30 a.m.-10:35 a.m.

1 stop37h 05m

C$ 1,050

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 5/3

7:00 p.m.-10:35 p.m.

1 stop19h 35m

London Gatwick

Fri 27/3

10:05 a.m.-6:05 p.m.

1 stop39h 00m

C$ 1,077

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 30/9

12:30 p.m.-10:20 p.m.

1 stop25h 50m

London Gatwick

Mon 6/10

5:15 p.m.-10:35 a.m.

1 stop25h 20m

C$ 1,099

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 January, then departing from Seattle during the month April is also very affordable. Most momondo users find prices during this month for around C$ 774.

What is the cheapest day to depart on your flight to London Gatwick Airport?

The cheapest day to depart on your flight to London Gatwick Airport is on a Sunday when prices can be found for as low as C$ 779. This is often the case because there is less demand to fly during this day of the week. On the other hand, Thursday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travellers. As a result, prices tend to be around C$ 1,216.

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

Direct flights

None
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 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
Ipswich
Dartford
Gatwick
Ilford
Wembley
Maidstone
Chelmsford
Wokingham
Slough
Canterbury
Feltham
Hayes
Uxbridge
Waterlooville
Newport
Basingstoke
Milton Keynes
Dover
Worthing

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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