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Cheap flights from Seattle to London from C$ 648

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 7/6. 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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Cheap round-trip flights

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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$ 1,152Icelandair
Sat, 19 Sep - Sun, 4 Oct
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$ 1,159Icelandair
Wed, 16 Sep - Sun, 4 Oct
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$ 1,160Icelandair
Thu, 17 Sep - Mon, 5 Oct
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$ 1,163Icelandair
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$ 1,169Icelandair
Sun, 6 Sep - Sat, 26 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$ 1,170Icelandair
Sun, 6 Sep - Fri, 25 Sep
Multiple Airlines Logo
7:00 p.m. - 7:15 p.m.
SEA
-
LGW
16h 15m
2 stops
Multiple Airlines Logo
3:40 p.m. - 8:40 p.m.
LGW
-
SEA
13h 00m
1 stop
C$ 1,181Multiple Airlines
Sun, 20 Sep - Tue, 6 Oct
Multiple Airlines Logo
7:00 p.m. - 7:15 p.m.
SEA
-
LGW
16h 15m
2 stops
Multiple Airlines Logo
3:40 p.m. - 8:40 p.m.
LGW
-
SEA
13h 00m
1 stop
C$ 1,184Multiple Airlines
Sun, 20 Sep - Wed, 7 Oct
Condor Logo
6:15 p.m. - 6:45 p.m.
SEA
-
LGW
16h 30m
1 stop
Condor Logo
10:20 a.m. - 4:10 p.m.
LGW
-
SEA
13h 50m
1 stop
C$ 1,186Condor
Sat, 5 Sep - Mon, 21 Sep
Condor Logo
6:10 p.m. - 6:50 p.m.
SEA
-
LGW
16h 40m
1 stop
Condor Logo
10:20 a.m. - 3:40 p.m.
LGW
-
SEA
13h 20m
1 stop
C$ 1,188Condor
Mon, 12 Oct - Sun, 18 Oct

Icelandair flights from Seattle to London Gatwick Airport

Our best Icelandair deals on Seattle to London Gatwick Airport flight tickets
Icelandair
3 Oct
SEA7:00 p.m.Seattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 p.m.London Gatwick
10 Oct
LGW3:40 p.m.London Gatwick
13h 00m
1 stop
SEA8:40 p.m.Seattle/Tacoma Intl
C$ 1,143
Icelandair
19 Sep
SEA7:00 p.m.Seattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 p.m.London Gatwick
4 Oct
LGW3:40 p.m.London Gatwick
13h 00m
1 stop
SEA8:40 p.m.Seattle/Tacoma Intl
C$ 1,152
Icelandair
16 Sep
SEA7:00 p.m.Seattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 p.m.London Gatwick
4 Oct
LGW3:40 p.m.London Gatwick
13h 00m
1 stop
SEA8:40 p.m.Seattle/Tacoma Intl
C$ 1,159

Condor flights from Seattle to London Gatwick Airport

Our best Condor deals on Seattle to London Gatwick Airport flight tickets
Condor
5 Sep
SEA6:15 p.m.Seattle/Tacoma Intl
16h 30m
1 stop
LGW6:45 p.m.London Gatwick
21 Sep
LGW10:20 a.m.London Gatwick
13h 50m
1 stop
SEA4:10 p.m.Seattle/Tacoma Intl
C$ 1,186
Condor
12 Oct
SEA6:10 p.m.Seattle/Tacoma Intl
16h 40m
1 stop
LGW6:50 p.m.London Gatwick
18 Oct
LGW10:20 a.m.London Gatwick
13h 20m
1 stop
SEA3:40 p.m.Seattle/Tacoma Intl
C$ 1,188
Condor
23 Aug
SEA5:40 p.m.Seattle/Tacoma Intl
17h 10m
1 stop
LGW6:50 p.m.London Gatwick
7 Sep
LGW7:40 p.m.London Gatwick
28h 00m
1 stop
SEA3:40 p.m.Seattle/Tacoma Intl
C$ 1,214

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 9 May 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
Quickest round-trip

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 19/9

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

1 stop11h 40m

London Gatwick

Sun 4/10

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

1 stop13h 00m

C$ 1,152

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 16/9

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

1 stop11h 40m

London Gatwick

Sun 4/10

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

1 stop13h 00m

C$ 1,159

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 17/9

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

1 stop15h 00m

London Gatwick

Mon 5/10

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

1 stop13h 00m

C$ 1,160

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 19/8

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

1 stop11h 40m

London Gatwick

Wed 2/9

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

1 stop13h 00m

C$ 1,163

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 6/9

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

1 stop11h 40m

London Gatwick

Sat 26/9

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

1 stop13h 00m

C$ 1,169

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 6/9

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

1 stop11h 40m

London Gatwick

Fri 25/9

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

1 stop13h 00m

C$ 1,170

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 20/9

7:00 p.m.-7:15 p.m.

2 stops16h 15m

London Gatwick

Tue 6/10

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

1 stop13h 00m

C$ 1,181

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 20/9

7:00 p.m.-7:15 p.m.

2 stops16h 15m

London Gatwick

Wed 7/10

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

1 stop13h 00m

C$ 1,184

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 5/9

6:15 p.m.-6:45 p.m.

1 stop16h 30m

London Gatwick

Mon 21/9

10:20 a.m.-4:10 p.m.

1 stop13h 50m

C$ 1,186

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 12/10

6:10 p.m.-6:50 p.m.

1 stop16h 40m

London Gatwick

Sun 18/10

10:20 a.m.-3:40 p.m.

1 stop13h 20m

C$ 1,188

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 November, then departing from Seattle during the month January is also very affordable. Most momondo users find prices during this month for around C$ 739.

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
Wokingham
Crawley
Feltham
Hayes
Waterlooville
Chelmsford
Basingstoke
Dover
Worthing
Woking
Ipswich
Enfield
Maidstone
Harrow
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

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.
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