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Cheap flights from Seattle to London from $341

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 12/4. 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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0 bags

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Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:35 pm - 9:05 pmSEA-LGW
22h 30m2 stops
Multiple Airlines Logo
8:50 am - 5:00 pmLGW-SEA
16h 10m2 stops
$527Multiple Airlines
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Wed, Dec 10 - Wed, Dec 24
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
$538Icelandair
Find Deal
Mon, Nov 10 - Tue, Nov 25
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
$543Icelandair
Find Deal
Tue, Nov 11 - Tue, Nov 18
Multiple Airlines Logo
8:05 pm - 7:25 pmSEA-LGW
15h 20m1 stop
Multiple Airlines Logo
9:00 am - 6:20 pmLGW-SEA
17h 20m1 stop
$548Multiple Airlines
Find Deal
Mon, Dec 1 - Mon, Dec 8
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
$551Icelandair
Find Deal
Sun, Nov 9 - Wed, Nov 19
Multiple Airlines Logo
8:10 am - 3:35 pmSEA-LGW
23h 25m2 stops
Multiple Airlines Logo
9:40 pm - 7:16 pmLGW-SEA
29h 36m3 stops
$552Multiple Airlines
Find Deal
Sun, Nov 23 - Tue, Dec 2
SWISS Logo
3:37 pm - 5:50 pmSEA-LGW
18h 13m2 stops
SWISS Logo
6:40 pm - 10:28 pmLGW-SEA
35h 48m2 stops
$624SWISS
Find Deal
Tue, Nov 25 - Wed, Dec 3
SWISS Logo
10:58 am - 5:50 pmSEA-LGW
22h 52m2 stops
SWISS Logo
6:40 pm - 9:12 pmLGW-SEA
34h 32m2 stops
$632SWISS
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Tue, Jan 27 - Mon, Feb 9
Turkish Airlines Logo
12:35 pm - 10:35 pmSEA-LGW
26h 00m2 stops
Turkish Airlines Logo
10:15 am - 6:52 pmLGW-SEA
40h 37m2 stops
$645Turkish Airlines
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Tue, Nov 11 - Tue, Nov 18
Turkish Airlines Logo
7:00 pm - 10:35 pmSEA-LGW
19h 35m1 stop
Turkish Airlines Logo
10:15 am - 5:05 pmLGW-SEA
38h 50m1 stop
$683Turkish Airlines
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Thu, Jan 8 - Tue, Feb 17

Turkish Airlines flights from Seattle to London Gatwick Airport

Our best Turkish Airlines deals on Seattle to London Gatwick Airport flight tickets
Turkish Airlines
Nov 11
SEA12:35 pmSeattle/Tacoma Intl
26h 00m
2 stops
LGW10:35 pmLondon Gatwick
Nov 18
LGW10:15 amLondon Gatwick
40h 37m
2 stops
SEA6:52 pmSeattle/Tacoma Intl
$645
Find similar
Turkish Airlines
Jan 8
SEA7:00 pmSeattle/Tacoma Intl
19h 35m
1 stop
LGW10:35 pmLondon Gatwick
Feb 17
LGW10:15 amLondon Gatwick
38h 50m
1 stop
SEA5:05 pmSeattle/Tacoma Intl
$683
Find similar
Turkish Airlines
Nov 11
SEA12:35 pmSeattle/Tacoma Intl
26h 00m
2 stops
LGW10:35 pmLondon Gatwick
Nov 18
LGW10:15 amLondon Gatwick
38h 50m
1 stop
SEA5:05 pmSeattle/Tacoma Intl
$756
Find similar

Icelandair flights from Seattle to London Gatwick Airport

Our best Icelandair deals on Seattle to London Gatwick Airport flight tickets
Icelandair
Nov 10
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 amLondon Gatwick
Nov 25
LGW11:55 amLondon Gatwick
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$538
Find similar
Icelandair
Nov 11
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 amLondon Gatwick
Nov 18
LGW11:55 amLondon Gatwick
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$543
Find similar
Icelandair
Nov 9
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 amLondon Gatwick
Nov 19
LGW11:55 amLondon Gatwick
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$551
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 832,500 searches. Data last updated November 4, 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 12/10

2:35 pm-9:05 pm

2 stops22h 30m

London Gatwick

Wed 12/24

8:50 am-5:00 pm

2 stops16h 10m

$527

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 11/10

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Tue 11/25

11:55 am-5:00 pm

1 stop13h 05m

$538

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 11/11

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Tue 11/18

11:55 am-5:00 pm

1 stop13h 05m

$543

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 12/1

8:05 pm-7:25 pm

1 stop15h 20m

London Gatwick

Mon 12/8

9:00 am-6:20 pm

1 stop17h 20m

$548

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 11/9

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

Wed 11/19

11:55 am-5:00 pm

1 stop13h 05m

$551

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 11/23

8:10 am-3:35 pm

2 stops23h 25m

London Gatwick

Tue 12/2

9:40 pm-7:16 pm

3 stops29h 36m

$552

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 11/25

3:37 pm-5:50 pm

2 stops18h 13m

London Gatwick

Wed 12/3

6:40 pm-10:28 pm

2 stops35h 48m

$624

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 1/27

10:58 am-5:50 pm

2 stops22h 52m

London Gatwick

Mon 2/9

6:40 pm-9:12 pm

2 stops34h 32m

$632

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 11/11

12:35 pm-10:35 pm

2 stops26h 00m

London Gatwick

Tue 11/18

10:15 am-6:52 pm

2 stops40h 37m

$645

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 1/8

7:00 pm-10:35 pm

1 stop19h 35m

London Gatwick

Tue 2/17

10:15 am-5:05 pm

1 stop38h 50m

$683

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 cheapest month to fly to London Gatwick Airport?

In general, January 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 $563. 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 $568.

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

The cheapest day to depart from Seattle to London Gatwick Airport is on a Sunday when prices can be found for as low as $643. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to London Gatwick Airport on Wednesday is $783.

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

Flying to London Gatwick Airport from Seattle at noon is the least expensive time of day to depart. momondo users have found prices as low as $608 when looking at flights departing at noon. In the morning is when there is more demand to fly to London Gatwick Airport, so prices are often more expensive at around $984 per ticket.

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 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 $503Free CancellationRating
7.1
568 reviews
Search Icelandair flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Crawley
Brentwood
Chelmsford
Folkestone
Romford
Ilford
Cobham
Wembley
Stansted
Watford
Harrow

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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