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Cheap flights from London Gatwick Airport to Seattle from £407

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 7/12. 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
0 bags
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Find the cheapest flights from London Gatwick Airport to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£444Icelandair
Find Deal
Wed, 26 Nov - Wed, 3 Dec
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£450Icelandair
Find Deal
Mon, 10 Nov - Mon, 24 Nov
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£452Icelandair
Find Deal
Mon, 17 Nov - Thu, 20 Nov
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£453Icelandair
Find Deal
Mon, 10 Nov - Mon, 24 Nov
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£455Icelandair
Find Deal
Mon, 10 Nov - Mon, 24 Nov
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£461Icelandair
Find Deal
Tue, 25 Nov - Wed, 10 Dec
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£461Icelandair
Find Deal
Wed, 12 Nov - Wed, 19 Nov
Multiple Airlines Logo
08:50 - 17:00LGW-SEA
16h 10m2 stops
Multiple Airlines Logo
14:35 - 17:20SEA-LGW
18h 45m2 stops
£463Multiple Airlines
Find Deal
Wed, 12 Nov - Wed, 19 Nov
SWISS Logo
18:40 - 22:32LGW-SEA
34h 52m2 stops
SWISS Logo
11:00 - 17:50SEA-LGW
23h 50m2 stops
£490SWISS
Find Deal
Tue, 10 Mar - Tue, 17 Mar
SWISS Logo
18:40 - 22:28LGW-SEA
35h 48m2 stops
SWISS Logo
10:53 - 17:50SEA-LGW
22h 57m2 stops
£512SWISS
Find Deal
Thu, 13 Nov - Thu, 27 Nov

Icelandair flights from London Gatwick Airport to Seattle

Our best Icelandair deals on London Gatwick Airport to Seattle flight tickets
Icelandair
26 Nov
LGW11:55London Gatwick
13h 05m
1 stop
SEA17:00Seattle/Tacoma Intl
3 Dec
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
£444
Find similar
Icelandair
10 Nov
LGW11:55London Gatwick
13h 05m
1 stop
SEA17:00Seattle/Tacoma Intl
24 Nov
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
£450
Find similar
Icelandair
17 Nov
LGW11:55London Gatwick
13h 05m
1 stop
SEA17:00Seattle/Tacoma Intl
20 Nov
SEA14:35Seattle/Tacoma Intl
12h 20m
1 stop
LGW10:55London Gatwick
£452
Find similar

SWISS flights from London Gatwick Airport to Seattle

Our best SWISS deals on London Gatwick Airport to Seattle flight tickets
SWISS
10 Mar
LGW18:40London Gatwick
34h 52m
2 stops
SEA22:32Seattle/Tacoma Intl
17 Mar
SEA11:00Seattle/Tacoma Intl
23h 50m
2 stops
LGW17:50London Gatwick
£490
Find similar
SWISS
13 Nov
LGW18:40London Gatwick
35h 48m
2 stops
SEA22:28Seattle/Tacoma Intl
27 Nov
SEA10:53Seattle/Tacoma Intl
22h 57m
2 stops
LGW17:50London Gatwick
£512
Find similar

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 15 October 2025.
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

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 26/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Wed 3/12

14:35-10:55

1 stop12h 20m

£444

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 10/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Mon 24/11

14:35-10:55

1 stop12h 20m

£450

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 17/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Thu 20/11

14:35-10:55

1 stop12h 20m

£452

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 10/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Mon 24/11

14:35-10:55

1 stop12h 20m

£453

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 10/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Mon 24/11

14:35-10:55

1 stop12h 20m

£455

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 25/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Wed 10/12

14:35-10:55

1 stop12h 20m

£461

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 12/11

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Wed 19/11

14:35-10:55

1 stop12h 20m

£461

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 12/11

08:50-17:00

2 stops16h 10m

Seattle/Tacoma Intl

Wed 19/11

14:35-17:20

2 stops18h 45m

£463

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 10/3

18:40-22:32

2 stops34h 52m

Seattle/Tacoma Intl

Tue 17/3

11:00-17:50

2 stops23h 50m

£490

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 13/11

18:40-22:28

2 stops35h 48m

Seattle/Tacoma Intl

Thu 27/11

10:53-17:50

2 stops22h 57m

£512

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 March. Flight prices, which tend to average around £404, are often lower during this time because this is during the off-season. The month of April is another great option to travel to Seattle, with average flight prices from London Gatwick Airport averaging around £412.

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

According to our data, Wednesday is the cheapest day to fly to Seattle from London Gatwick Airport. The lowest ticket price found for a Wednesday departure recently was £598. 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 £692.

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 in the evening. momondo users have found flights departing from London Gatwick Airport to Seattle in the evening for as low as £530. 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 £637.

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

Direct flights

None
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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  • 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 05m.

  • 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 £328Free CancellationRating
7.0
556 reviews
Search Icelandair flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Fife
Renton
SeaTac

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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