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Cheap flights from Seattle to London from $220

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 10/1. 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

Logo
7:20 am - 6:25 pmSEA-LGW
27h 05m2 stops
Logo
10:00 pm - 8:45 pmLGW-SEA
30h 45m2 stops
$462
Find Deal
on., aug. 13 - on., aug. 20
Logo
7:20 am - 6:25 pmSEA-LGW
27h 05m2 stops
Logo
10:00 pm - 8:45 pmLGW-SEA
30h 45m2 stops
$463
Find Deal
on., aug. 13 - on., aug. 20
Icelandair Logo
7:00 pm - 2:40 pmSEA-LGW
11h 40m1 stop
Icelandair Logo
3:40 pm - 5:50 pmLGW-SEA
34h 10m1 stop
$486Icelandair
Find Deal
ti., sep. 30 - lø., okt. 11
Logo
10:58 pm - 8:35 amSEA-LGW
25h 37m1 stop
Logo
2:30 pm - 10:19 amLGW-SEA
27h 49m1 stop
$487
Find Deal
sø., aug. 17 - fr., okt. 3
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
$490Icelandair
Find Deal
on., nov. 12 - lø., nov. 22
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
$491Icelandair
Find Deal
on., nov. 12 - lø., nov. 22
Icelandair Logo
7:00 pm - 2:40 pmSEA-LGW
11h 40m1 stop
Icelandair Logo
3:40 pm - 8:40 pmLGW-SEA
13h 00m1 stop
$492Icelandair
Find Deal
on., okt. 1 - ma., okt. 6
SWISS Logo
4:25 pm - 5:50 pmSEA-LGW
17h 25m1 stop
SWISS Logo
6:35 pm - 6:36 pmLGW-SEA
32h 01m2 stops
$512SWISS
Find Deal
ma., sep. 8 - ti., sep. 16
SWISS Logo
4:25 pm - 5:50 pmSEA-LGW
17h 25m1 stop
SWISS Logo
6:35 pm - 6:36 pmLGW-SEA
32h 01m2 stops
$514SWISS
Find Deal
ma., aug. 11 - ma., aug. 18
SWISS Logo
4:25 pm - 5:50 pmSEA-LGW
17h 25m1 stop
SWISS Logo
6:35 pm - 10:59 pmLGW-SEA
36h 24m2 stops
$523SWISS
Find Deal
ma., aug. 11 - ma., aug. 25

Icelandair flights from Seattle to London Gatwick Airport

Our best Icelandair deals on Seattle to London Gatwick Airport flight tickets
Icelandair
Sep 30
SEA7:00 pmSeattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 pmLondon Gatwick
Oct 11
LGW3:40 pmLondon Gatwick
34h 10m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$486
Find similar
Icelandair
Nov 12
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 amLondon Gatwick
Nov 22
LGW11:55 amLondon Gatwick
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$490
Find similar
Icelandair
Nov 12
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 amLondon Gatwick
Nov 22
LGW11:55 amLondon Gatwick
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$491
Find similar

SWISS flights from Seattle to London Gatwick Airport

Our best SWISS deals on Seattle to London Gatwick Airport flight tickets
SWISS
Sep 8
SEA4:25 pmSeattle/Tacoma Intl
17h 25m
1 stop
LGW5:50 pmLondon Gatwick
Sep 16
LGW6:35 pmLondon Gatwick
32h 01m
2 stops
SEA6:36 pmSeattle/Tacoma Intl
$512
Find similar
SWISS
Aug 11
SEA4:25 pmSeattle/Tacoma Intl
17h 25m
1 stop
LGW5:50 pmLondon Gatwick
Aug 18
LGW6:35 pmLondon Gatwick
32h 01m
2 stops
SEA6:36 pmSeattle/Tacoma Intl
$514
Find similar
SWISS
Aug 11
SEA4:25 pmSeattle/Tacoma Intl
17h 25m
1 stop
LGW5:50 pmLondon Gatwick
Aug 25
LGW6:35 pmLondon Gatwick
36h 24m
2 stops
SEA10:59 pmSeattle/Tacoma Intl
$523
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 juli 31, 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

on. 8/13

7:20 am-6:25 pm

2 stops27h 05m

London Gatwick

on. 8/20

10:00 pm-8:45 pm

2 stops30h 45m

$462

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

on. 8/13

7:20 am-6:25 pm

2 stops27h 05m

London Gatwick

on. 8/20

10:00 pm-8:45 pm

2 stops30h 45m

$463

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

ti. 9/30

7:00 pm-2:40 pm

1 stop11h 40m

London Gatwick

lø. 10/11

3:40 pm-5:50 pm

1 stop34h 10m

$486

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

sø. 8/17

10:58 pm-8:35 am

1 stop25h 37m

London Gatwick

fr. 10/3

2:30 pm-10:19 am

1 stop27h 49m

$487

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

on. 11/12

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

lø. 11/22

11:55 am-5:00 pm

1 stop13h 05m

$490

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

on. 11/12

2:35 pm-10:55 am

1 stop12h 20m

London Gatwick

lø. 11/22

11:55 am-5:00 pm

1 stop13h 05m

$491

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

on. 10/1

7:00 pm-2:40 pm

1 stop11h 40m

London Gatwick

ma. 10/6

3:40 pm-8:40 pm

1 stop13h 00m

$492

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

ma. 9/8

4:25 pm-5:50 pm

1 stop17h 25m

London Gatwick

ti. 9/16

6:35 pm-6:36 pm

2 stops32h 01m

$512

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

ma. 8/11

4:25 pm-5:50 pm

1 stop17h 25m

London Gatwick

ma. 8/18

6:35 pm-6:36 pm

2 stops32h 01m

$514

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

ma. 8/11

4:25 pm-5:50 pm

1 stop17h 25m

London Gatwick

ma. 8/25

6:35 pm-10:59 pm

2 stops36h 24m

$523

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 $557. 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

Best Price Found

$220

Fastest flight time

11h 35m

Direct flights

None
The best one-way flight to London Gatwick Airport from Seattle in the past 72 hours is $220. The best round-trip flight deal from Seattle to London Gatwick Airport found on momondo in the last 72 hours is $462.
The fastest flight from Seattle to London Gatwick Airport takes 11h 35m
There are no direct flights from Seattle to London Gatwick Airport. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - 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 11h 35m.

  • 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 $512Free CancellationRating
7.0
520 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
Dover
Slough
Luton
Dartford
Guildford
Milton Keynes
Stansted
Hayes
Crawley
Croydon
Chelmsford
Ilford
Brentwood
Colchester
Folkestone
Watford
Canterbury
Richmond

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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