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Cheap flights from Seattle to London from $283

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 10/16. 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.
Multiple Airlines Logo
7:00 pm - 8:40 am
SEA
-
LGW
29h 40m
3 stops
Multiple Airlines Logo
11:00 am - 11:45 am
LGW
-
SEA
32h 45m
2 stops
$636Multiple Airlines
Sun, Aug 16 - Wed, Aug 26
Icelandair Logo
2:35 pm - 10:55 am
SEA
-
LGW
12h 20m
1 stop
Icelandair Logo
11:55 am - 5:00 pm
LGW
-
SEA
13h 05m
1 stop
$641Icelandair
Thu, Nov 19 - Wed, Dec 2
Icelandair Logo
2:35 pm - 10:55 am
SEA
-
LGW
12h 20m
1 stop
Icelandair Logo
11:55 am - 5:00 pm
LGW
-
SEA
13h 05m
1 stop
$644Icelandair
Sun, Nov 15 - Wed, Dec 2
Multiple Airlines Logo
3:40 pm - 7:15 pm
SEA
-
LGW
19h 35m
2 stops
Multiple Airlines Logo
8:45 pm - 5:55 pm
LGW
-
SEA
29h 10m
3 stops
$644Multiple Airlines
Wed, Sep 30 - Wed, Oct 7
Icelandair Logo
2:35 pm - 10:55 am
SEA
-
LGW
12h 20m
1 stop
Icelandair Logo
11:55 am - 5:00 pm
LGW
-
SEA
13h 05m
1 stop
$645Icelandair
Tue, Nov 17 - Wed, Dec 2
Multiple Airlines Logo
8:00 am - 7:05 pm
SEA
-
LGW
27h 05m
3 stops
Multiple Airlines Logo
5:40 pm - 1:00 pm
LGW
-
SEA
26h 20m
2 stops
$646Multiple Airlines
Wed, Oct 21 - Wed, Oct 28
Multiple Airlines Logo
3:40 pm - 9:10 am
SEA
-
LGW
33h 30m
3 stops
Multiple Airlines Logo
3:40 pm - 8:40 pm
LGW
-
SEA
13h 00m
1 stop
$647Multiple Airlines
Mon, Sep 7 - Tue, Sep 22
Multiple Airlines Logo
7:00 pm - 8:40 am
SEA
-
LGW
29h 40m
3 stops
Multiple Airlines Logo
11:00 am - 11:45 am
LGW
-
SEA
32h 45m
2 stops
$652Multiple Airlines
Tue, Aug 25 - Wed, Sep 2
Multiple Airlines Logo
3:40 pm - 9:10 am
SEA
-
LGW
33h 30m
3 stops
Multiple Airlines Logo
3:40 pm - 8:40 pm
LGW
-
SEA
13h 00m
1 stop
$656Multiple Airlines
Mon, Sep 7 - Tue, Sep 22
Multiple Airlines Logo
8:00 am - 7:15 pm
SEA
-
LGW
27h 15m
3 stops
Multiple Airlines Logo
7:55 pm - 2:22 pm
LGW
-
SEA
26h 27m
3 stops
$656Multiple Airlines
Mon, Sep 7 - Mon, Sep 21

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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
Oct 6
SEA7:00 pmSeattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 pmLondon Gatwick
Oct 13
LGW3:40 pmLondon Gatwick
13h 00m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$702
Icelandair
Oct 6
SEA7:00 pmSeattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 pmLondon Gatwick
Oct 11
LGW3:40 pmLondon Gatwick
13h 00m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$703
Icelandair
Sep 8
SEA7:00 pmSeattle/Tacoma Intl
32h 45m
1 stop
LGW11:45 amLondon Gatwick
Oct 6
LGW3:40 pmLondon Gatwick
13h 00m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$705

Condor flights from Seattle to London Gatwick Airport

Our best Condor deals on Seattle to London Gatwick Airport flight tickets
Condor
Aug 18
SEA6:05 pmSeattle/Tacoma Intl
16h 45m
1 stop
LGW6:50 pmLondon Gatwick
Sep 30
LGW10:20 amLondon Gatwick
13h 20m
1 stop
SEA3:40 pmSeattle/Tacoma Intl
$798
Condor
Aug 18
SEA6:05 pmSeattle/Tacoma Intl
16h 45m
1 stop
LGW6:50 pmLondon Gatwick
Sep 2
LGW10:20 amLondon Gatwick
13h 20m
1 stop
SEA3:40 pmSeattle/Tacoma Intl
$809
Condor
Aug 18
SEA6:05 pmSeattle/Tacoma Intl
16h 45m
1 stop
LGW6:50 pmLondon Gatwick
Sep 30
LGW10:20 amLondon Gatwick
13h 20m
1 stop
SEA3:40 pmSeattle/Tacoma Intl
$813

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 832,500 searches. Data last updated August 4, 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

Sun 8/16

7:00 pm-8:40 am

3 stops29h 40m

London Gatwick

Wed 8/26

11:00 am-11:45 am

2 stops32h 45m

$636
Quickest round-trip

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 11/19

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Wed 12/2

11:55 am-5:00 pm

1 stop13h 05m

$641

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 11/15

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Wed 12/2

11:55 am-5:00 pm

1 stop13h 05m

$644

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 9/30

3:40 pm-7:15 pm

2 stops19h 35m

London Gatwick

Wed 10/7

8:45 pm-5:55 pm

3 stops29h 10m

$644

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 11/17

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Wed 12/2

11:55 am-5:00 pm

1 stop13h 05m

$645

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 10/21

8:00 am-7:05 pm

3 stops27h 05m

London Gatwick

Wed 10/28

5:40 pm-1:00 pm

2 stops26h 20m

$646

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 9/7

3:40 pm-9:10 am

3 stops33h 30m

London Gatwick

Tue 9/22

3:40 pm-8:40 pm

1 stop13h 00m

$647

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 8/25

7:00 pm-8:40 am

3 stops29h 40m

London Gatwick

Wed 9/2

11:00 am-11:45 am

2 stops32h 45m

$652

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 9/7

3:40 pm-9:10 am

3 stops33h 30m

London Gatwick

Tue 9/22

3:40 pm-8:40 pm

1 stop13h 00m

$656

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 9/7

8:00 am-7:15 pm

3 stops27h 15m

London Gatwick

Mon 9/21

7:55 pm-2:22 pm

3 stops26h 27m

$656

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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?

In general, August is the cheapest month to fly from Seattle to London Gatwick Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. 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 $519.

Can stopping save me money on Seattle to London Gatwick Airport flights?

You could potentially save up to 36% on your flight if you consider stops on a Seattle to London Gatwick Airport flight.

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

12h 20m

Direct flights

None
The fastest flight from Seattle to London Gatwick Airport takes 12h 20m
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 4798.7 mi apart from one another. In terms of flight time, this usually takes a little over 12h 20m.

  • 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 many operators does momondo search for flights from Seattle/Tacoma Intl Airport to London Gatwick Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to London Gatwick Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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.

  • What is the most popular airline from Seattle to London Gatwick Airport?

Best airlines flying from Seattle to London Gatwick Airport

Compare and see reviews for airlines that fly from Seattle to London Gatwick Airport with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $498Free CancellationRating
6.9
720 reviews
Search Icelandair flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Milton Keynes
Luton
Hayes
Wembley
Dover
Croydon
Stansted
Kingston upon Thames
Slough
Harrow
Watford
Cobham
Richmond
Uxbridge
Worthing
Romford
Ilford
Dunstable

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 enables you to select and highlight flights to London from Seattle with this policy.

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

Once you have performed a search for Seattle to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to London from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your London Gatwick Airport trip

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