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Cheap flights from London Gatwick Airport to Seattle from £391

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Gatwick Airport to Seattle 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.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from London Gatwick Airport to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Icelandair Logo
15:40 - 20:40LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:35 - 10:55SEA  Seattle/Tacoma Intl-LGW London Gatwick
12h 20m1 stop Reykjavik Keflavik Intl
£457Icelandair
Tue, 20 Oct - Tue, 27 Oct
Icelandair Logo
15:40 - 20:40LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 14:40SEA  Seattle/Tacoma Intl-LGW London Gatwick
15h 00m1 stop Reykjavik Keflavik Intl
£462Icelandair
Mon, 7 Sep - Fri, 25 Sep
Icelandair Logo
15:40 - 20:40LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 14:40SEA  Seattle/Tacoma Intl-LGW London Gatwick
15h 00m1 stop Reykjavik Keflavik Intl
£463Icelandair
Tue, 13 Oct - Wed, 21 Oct
Icelandair Logo
11:55 - 17:00LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 05m1 stop Reykjavik Keflavik Intl
Icelandair Logo
14:35 - 10:55SEA  Seattle/Tacoma Intl-LGW London Gatwick
12h 20m1 stop Reykjavik Keflavik Intl
£465Icelandair
Mon, 14 Dec - Mon, 28 Dec
Icelandair Logo
15:40 - 20:40LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 14:35SEA  Seattle/Tacoma Intl-LGW London Gatwick
14h 55m1 stop Reykjavik Keflavik Intl
£467Icelandair
Mon, 7 Sep - Sat, 26 Sep
Icelandair Logo
15:40 - 20:40LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 14:40SEA  Seattle/Tacoma Intl-LGW London Gatwick
15h 00m1 stop Reykjavik Keflavik Intl
£468Icelandair
Wed, 26 Aug - Mon, 7 Sep
Icelandair Logo
13:00 - 11:45LGW  London Gatwick-SEA Seattle/Tacoma Intl
30h 45m1 stop Reykjavik Keflavik Intl
Icelandair Logo
19:00 - 14:40SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 40m1 stop Reykjavik Keflavik Intl
£469Icelandair
Sun, 30 Aug - Mon, 7 Sep
Icelandair Logo
13:00 - 11:45LGW  London Gatwick-SEA Seattle/Tacoma Intl
30h 45m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 14:40SEA  Seattle/Tacoma Intl-LGW London Gatwick
15h 00m1 stop Reykjavik Keflavik Intl
£471Icelandair
Sun, 30 Aug - Mon, 7 Sep
Multiple Airlines Logo
17:25 - 16:00LGW  London Gatwick-SEA Seattle/Tacoma Intl
30h 35m2 stops Barcelona-El Prat Frankfurt am Main
Multiple Airlines Logo
17:40 - 19:55SEA  Seattle/Tacoma Intl-LGW London Gatwick
18h 15m2 stops Frankfurt am Main Barcelona-El Prat
£478Multiple Airlines
Wed, 14 Oct - Wed, 21 Oct
Multiple Airlines Logo
17:25 - 16:00LGW  London Gatwick-SEA Seattle/Tacoma Intl
30h 35m2 stops Barcelona-El Prat Frankfurt am Main
Multiple Airlines Logo
17:40 - 19:55SEA  Seattle/Tacoma Intl-LGW London Gatwick
18h 15m2 stops Frankfurt am Main Barcelona-El Prat
£481Multiple Airlines
Wed, 14 Oct - Wed, 21 Oct

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Icelandair flights from London Gatwick Airport to Seattle

Our best Icelandair deals on London Gatwick Airport to Seattle flight tickets
Icelandair
20 Oct
LGW15:40London Gatwick
13h 00m
1 stop
SEA20:40Seattle/Tacoma Intl
27 Oct
SEA15:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
£457
Icelandair
7 Sept
LGW15:40London Gatwick
13h 00m
1 stop
SEA20:40Seattle/Tacoma Intl
25 Sept
SEA15:40Seattle/Tacoma Intl
15h 00m
1 stop
LGW14:40London Gatwick
£462
Icelandair
13 Oct
LGW15:40London Gatwick
13h 00m
1 stop
SEA20:40Seattle/Tacoma Intl
21 Oct
SEA15:40Seattle/Tacoma Intl
15h 00m
1 stop
LGW14:40London Gatwick
£463

KLM flights from London Gatwick Airport to Seattle

Our best KLM deals on London Gatwick Airport to Seattle flight tickets
KLM
19 Aug
LGW10:25London Gatwick
32h 50m
1 stop
SEA11:15Seattle/Tacoma Intl
23 Aug
SEA13:30Seattle/Tacoma Intl
11h 55m
1 stop
LGW09:25London Gatwick
£621
KLM
17 Aug
LGW10:25London Gatwick
32h 50m
1 stop
SEA11:15Seattle/Tacoma Intl
23 Aug
SEA13:30Seattle/Tacoma Intl
11h 55m
1 stop
LGW09:25London Gatwick
£782
KLM
9 Aug
LGW17:00London Gatwick
26h 15m
1 stop
SEA11:15Seattle/Tacoma Intl
16 Aug
SEA13:30Seattle/Tacoma Intl
18h 30m
1 stop
LGW16:00London Gatwick
£801

momondo Fare Finder

 
Customise your flight search to find flights from London Gatwick Airport to Seattle 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 279,928 searches. Data last updated 8 August 2026.
Use the filters below to find and compare flights from London Gatwick Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Tue 20/10

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Tue 27/10

15:35-10:55

1 stop12h 20m

£457

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Mon 7/9

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Fri 25/9

15:40-14:40

1 stop15h 00m

£462

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Tue 13/10

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Wed 21/10

15:40-14:40

1 stop15h 00m

£463

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Mon 14/12

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Mon 28/12

14:35-10:55

1 stop12h 20m

£465

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Mon 7/9

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Sat 26/9

15:40-14:35

1 stop14h 55m

£467

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Wed 26/8

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Mon 7/9

15:40-14:40

1 stop15h 00m

£468

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Sun 30/8

13:00-11:45

1 stop30h 45m

Seattle/Tacoma Intl

Mon 7/9

19:00-14:40

1 stop11h 40m

£469

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Sun 30/8

13:00-11:45

1 stop30h 45m

Seattle/Tacoma Intl

Mon 7/9

15:40-14:40

1 stop15h 00m

£471

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Wed 14/10

17:25-16:00

2 stops30h 35m

Seattle/Tacoma Intl

Wed 21/10

17:40-19:55

2 stops18h 15m

£478

LondonSeattle

LGW London Gatwick - SEA Seattle/Tacoma Intl

LGWSEA

London Gatwick

Wed 14/10

17:25-16:00

2 stops30h 35m

Seattle/Tacoma Intl

Wed 21/10

17:40-19:55

2 stops18h 15m

£481

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from London Gatwick Airport to Seattle

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 Seattle?

The cheapest month to fly to Seattle from London Gatwick Airport is in February. Flight prices, which tend to average around £0, are often lower during this time because this is during the off-season. The month of January is another great option to travel to Seattle, with average flight prices from London Gatwick Airport averaging around £393.

What is the cheapest day to depart on your flight to Seattle?

According to our data, Thursday is the cheapest day to fly to Seattle from London Gatwick Airport. The lowest ticket price found for a Thursday departure recently was £595. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Sunday is £671.

What is the cheapest time of day to depart on your flight to Seattle?

According to our data, the cheapest time of day to fly to Seattle is at midday. momondo users have found flights departing from London Gatwick Airport to Seattle at midday for as low as £590. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive, with an average ticket price of £634.

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

You could potentially save up to 45% on your flight if you consider stops on a London Gatwick Airport to Seattle flight.

When to book flights from London Gatwick Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Gatwick Airport to Seattle (LGW to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Seattle

Fastest flight time

13h 00m

Direct flights

None
The fastest flight from London Gatwick Airport to Seattle takes 13h 00m
There are no direct flights from London Gatwick Airport to Seattle. There are no popular flight routes from London Gatwick Airport to Seattle.
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Frequently asked questions about flying from London Gatwick Airport to Seattle

  • How far is London Gatwick to Seattle/Tacoma Intl by plane?

    The straight-line distance from London Gatwick to Seattle/Tacoma Intl is 4798.7 mi. A reasonable flight in good conditions will take 13h 00m.

  • When did momondo last update prices for flights from London Gatwick Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from London Gatwick Airport to Seattle/Tacoma Intl Airport were last updated today.

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

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

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

Best airlines flying from London Gatwick Airport to Seattle

Compare and see reviews for airlines that fly from London Gatwick Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £392Free CancellationRating
7.0
721 reviews
Search Icelandair flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Westport
Kirkland
Ashford
Tacoma
SeaTac
Tukwila
Fife

Why use momondo?

Why should I use momondo to find a flight deal from London to Seattle?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from London.

Can I find flights from London to Seattle with flexible booking policies on momondo?

Flights from London to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential London to Seattle 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 London to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from London and alert you when they change.

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