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Cheap flights from Seattle to London from $314

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 8/17. 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 pm - 10:55 am
SEA
-
LGW
12h 20m
1 stop
Icelandair Logo
11:55 am - 5:00 pm
LGW
-
SEA
13h 05m
1 stop
$849Icelandair
Sat, Nov 7 - Wed, Nov 11
Icelandair Logo
7:00 pm - 11:45 am
SEA
-
LGW
32h 45m
1 stop
Icelandair Logo
3:40 pm - 8:40 pm
LGW
-
SEA
13h 00m
1 stop
$850Icelandair
Fri, Aug 21 - Sat, Aug 29
Multiple Airlines Logo
11:25 pm - 2:40 pm
SEA
-
LGW
31h 15m
1 stop
Multiple Airlines Logo
9:25 am - 6:32 pm
LGW
-
SEA
17h 07m
2 stops
$851Multiple Airlines
Wed, Aug 26 - Wed, Sep 9
Multiple Airlines Logo
8:00 am - 8:10 pm
SEA
-
LGW
28h 10m
3 stops
Multiple Airlines Logo
9:10 am - 11:55 am
LGW
-
SEA
34h 45m
3 stops
$852Multiple Airlines
Wed, Sep 16 - Sat, Sep 19
Condor Logo
6:05 pm - 6:50 pm
SEA
-
LGW
16h 45m
1 stop
Condor Logo
10:20 am - 4:00 pm
LGW
-
SEA
13h 40m
1 stop
$853Condor
Thu, Sep 3 - Sat, Sep 19
Icelandair Logo
7:00 pm - 2:40 pm
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
3:40 pm - 8:40 pm
LGW
-
SEA
13h 00m
1 stop
$854Icelandair
Thu, Sep 17 - Sat, Sep 26
Multiple Airlines Logo
2:35 pm - 3:30 pm
SEA
-
LGW
16h 55m
1 stop
Multiple Airlines Logo
7:40 am - 5:00 pm
LGW
-
SEA
17h 20m
1 stop
$855Multiple Airlines
Mon, Nov 30 - Mon, Dec 7
Icelandair Logo
7:00 pm - 2:40 pm
SEA
-
LGW
11h 40m
1 stop
Icelandair Logo
3:40 pm - 11:45 am
LGW
-
SEA
28h 05m
1 stop
$856Icelandair
Thu, Aug 20 - Wed, Aug 26
SWISS Logo
10:45 am - 5:50 pm
SEA
-
LGW
23h 05m
2 stops
SWISS Logo
9:25 am - 6:32 pm
LGW
-
SEA
17h 07m
2 stops
$857SWISS
Mon, Aug 17 - Tue, Aug 25
SWISS Logo
10:45 am - 5:50 pm
SEA
-
LGW
23h 05m
2 stops
SWISS Logo
9:25 am - 6:32 pm
LGW
-
SEA
17h 07m
2 stops
$858SWISS
Mon, Aug 17 - Tue, Aug 25

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Delta flights from Seattle to London Gatwick Airport

Our best Delta deals on Seattle to London Gatwick Airport flight tickets
Delta
Sep 27
SEA6:45 pmSeattle/Tacoma Intl
13h 15m
1 stop
LGW4:00 pmLondon Gatwick
Oct 16
LGW10:25 amLondon Gatwick
15h 22m
1 stop
SEA5:47 pmSeattle/Tacoma Intl
$860
Delta
Sep 26
SEA10:40 pmSeattle/Tacoma Intl
26h 45m
2 stops
LGW9:25 amLondon Gatwick
Oct 15
LGW10:25 amLondon Gatwick
15h 22m
1 stop
SEA5:47 pmSeattle/Tacoma Intl
$865
Delta
Sep 27
SEA1:30 pmSeattle/Tacoma Intl
18h 30m
1 stop
LGW4:00 pmLondon Gatwick
Oct 19
LGW10:25 amLondon Gatwick
32h 50m
1 stop
SEA11:15 amSeattle/Tacoma Intl
$873

SWISS flights from Seattle to London Gatwick Airport

Our best SWISS deals on Seattle to London Gatwick Airport flight tickets
SWISS
Aug 17
SEA10:45 amSeattle/Tacoma Intl
23h 05m
2 stops
LGW5:50 pmLondon Gatwick
Aug 25
LGW9:25 amLondon Gatwick
17h 07m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$857
SWISS
Aug 17
SEA10:45 amSeattle/Tacoma Intl
23h 05m
2 stops
LGW5:50 pmLondon Gatwick
Aug 25
LGW9:25 amLondon Gatwick
17h 07m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$858
SWISS
Oct 17
SEA7:00 amSeattle/Tacoma Intl
26h 50m
2 stops
LGW5:50 pmLondon Gatwick
Oct 22
LGW9:25 amLondon Gatwick
17h 07m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$863

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 June 23, 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 11/7

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Wed 11/11

11:55 am-5:00 pm

1 stop13h 05m

$849

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 8/21

7:00 pm-11:45 am

1 stop32h 45m

London Gatwick

Sat 8/29

3:40 pm-8:40 pm

1 stop13h 00m

$850

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 8/26

11:25 pm-2:40 pm

1 stop31h 15m

London Gatwick

Wed 9/9

9:25 am-6:32 pm

2 stops17h 07m

$851

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 9/16

8:00 am-8:10 pm

3 stops28h 10m

London Gatwick

Sat 9/19

9:10 am-11:55 am

3 stops34h 45m

$852

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 9/3

6:05 pm-6:50 pm

1 stop16h 45m

London Gatwick

Sat 9/19

10:20 am-4:00 pm

1 stop13h 40m

$853
Quickest round-trip

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 9/17

7:00 pm-2:40 pm

1 stop11h 40m

London Gatwick

Sat 9/26

3:40 pm-8:40 pm

1 stop13h 00m

$854

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 11/30

2:35 pm-3:30 pm

1 stop16h 55m

London Gatwick

Mon 12/7

7:40 am-5:00 pm

1 stop17h 20m

$855

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 8/20

7:00 pm-2:40 pm

1 stop11h 40m

London Gatwick

Wed 8/26

3:40 pm-11:45 am

1 stop28h 05m

$856

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 8/17

10:45 am-5:50 pm

2 stops23h 05m

London Gatwick

Tue 8/25

9:25 am-6:32 pm

2 stops17h 07m

$857

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 8/17

10:45 am-5:50 pm

2 stops23h 05m

London Gatwick

Tue 8/25

9:25 am-6:32 pm

2 stops17h 07m

$858

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

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 $516. 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 54% 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

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 4798.7 mi apart from one another. In terms of flight time, this usually takes a little over 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 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
7.0
683 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
Dover
Crawley
Croydon
Wembley
Stansted
Harrow
Slough
Watford
Cobham
Brentwood
Guildford
Ilford
Folkestone
Uxbridge
Romford

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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