What is the cheapest airline that flies from London Gatwick to Seattle/Tacoma Intl?

WestJet and Icelandair are the most popular carriers operating from London Gatwick to Seattle/Tacoma Intl

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 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.

£337 Cheap Flights from London Gatwick Airport to Seattle (LGW-SEA) in 2025

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Find the cheapest flights from London Gatwick Airport to Seattle (LGW-SEA)

Round-trip

One-way

Last minute

Cheap return flights

15:40 - 20:40LGW-SEA

13h 00m1 stop

15:45 - 14:40SEA-LGW

14h 55m1 stop

£474Icelandair

Find Deal

Mon, 8 Sep - Fri, 26 Sep

15:40 - 20:40LGW-SEA

13h 00m1 stop

15:45 - 14:40SEA-LGW

14h 55m1 stop

£474Icelandair

Find Deal

Mon, 8 Sep - Fri, 26 Sep

15:40 - 20:40LGW-SEA

13h 00m1 stop

19:00 - 14:40SEA-LGW

11h 40m1 stop

£476Icelandair

Find Deal

Thu, 2 Oct - Sun, 12 Oct

09:50 - 23:59LGW-SEA

22h 09m1 stop

22:55 - 06:20SEA-LGW

23h 25m1 stop

£476

Find Deal

Sat, 27 Sep - Fri, 17 Oct

15:40 - 17:50LGW-SEA

34h 10m1 stop

15:45 - 14:40SEA-LGW

14h 55m1 stop

£477Icelandair

Find Deal

Tue, 30 Sep - Fri, 10 Oct

13:05 - 21:51LGW-SEA

16h 46m1 stop

21:30 - 06:20SEA-LGW

24h 50m1 stop

£480

Find Deal

Mon, 29 Sep - Tue, 14 Oct

15:40 - 20:40LGW-SEA

13h 00m1 stop

19:00 - 14:40SEA-LGW

11h 40m1 stop

£481Icelandair

Find Deal

Fri, 26 Sep - Fri, 10 Oct

15:05 - 18:28LGW-SEA

35h 23m2 stops

23:38 - 08:10SEA-LGW

24h 32m2 stops

£489American Airlines

Find Deal

Wed, 3 Sep - Sun, 21 Sep

15:05 - 08:12LGW-SEA

25h 07m2 stops

05:26 - 08:10SEA-LGW

18h 44m2 stops

£491American Airlines

Find Deal

Wed, 3 Sep - Thu, 18 Sep

18:40 - 21:22LGW-SEA

34h 42m2 stops

16:20 - 17:50SEA-LGW

17h 30m1 stop

£515SWISS

Find Deal

Thu, 4 Sep - Sat, 13 Sep

Icelandair flights from London Gatwick Airport to Seattle

Our best Icelandair deals on London Gatwick Airport to Seattle flight tickets

Icelandair

8 Sept

LGW15:40London Gatwick

13h 00m

1 stop

SEA20:40Seattle/Tacoma Intl

26 Sept

SEA15:45Seattle/Tacoma Intl

14h 55m

1 stop

LGW14:40London Gatwick

£474

Find similar

Icelandair

8 Sept

LGW15:40London Gatwick

13h 00m

1 stop

SEA20:40Seattle/Tacoma Intl

26 Sept

SEA15:45Seattle/Tacoma Intl

14h 55m

1 stop

LGW14:40London Gatwick

£474

Find similar

Icelandair

2 Oct

LGW15:40London Gatwick

13h 00m

1 stop

SEA20:40Seattle/Tacoma Intl

12 Oct

SEA19:00Seattle/Tacoma Intl

11h 40m

1 stop

LGW14:40London Gatwick

£476

Find similar

SWISS flights from London Gatwick Airport to Seattle

Our best SWISS deals on London Gatwick Airport to Seattle flight tickets

SWISS

4 Sept

LGW18:40London Gatwick

34h 42m

2 stops

SEA21:22Seattle/Tacoma Intl

13 Sept

SEA16:20Seattle/Tacoma Intl

17h 30m

1 stop

LGW17:50London Gatwick

£515

Find similar

SWISS

29 Aug

LGW18:40London Gatwick

35h 40m

2 stops

SEA22:20Seattle/Tacoma Intl

5 Sept

SEA10:55Seattle/Tacoma Intl

22h 55m

2 stops

LGW17:50London Gatwick

£696

Find similar

SWISS

25 Aug

LGW18:35London Gatwick

32h 01m

2 stops

SEA18:36Seattle/Tacoma Intl

6 Sept

SEA16:20Seattle/Tacoma Intl

17h 30m

1 stop

LGW17:50London Gatwick

£738

Find similar

momondo Fare Finder

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

Mon 8/9

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Fri 26/9

15:45-14:40

1 stop14h 55m

£474

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 8/9

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Fri 26/9

15:45-14:40

1 stop14h 55m

£474

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 2/10

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Sun 12/10

19:00-14:40

1 stop11h 40m

£476

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 27/9

09:50-23:59

1 stop22h 09m

Seattle/Tacoma Intl

Fri 17/10

22:55-06:20

1 stop23h 25m

£476

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 30/9

15:40-17:50

1 stop34h 10m

Seattle/Tacoma Intl

Fri 10/10

15:45-14:40

1 stop14h 55m

£477

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 29/9

13:05-21:51

1 stop16h 46m

Seattle/Tacoma Intl

Tue 14/10

21:30-06:20

1 stop24h 50m

£480

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 26/9

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Fri 10/10

19:00-14:40

1 stop11h 40m

£481

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 3/9

15:05-18:28

2 stops35h 23m

Seattle/Tacoma Intl

Sun 21/9

23:38-08:10

2 stops24h 32m

£489

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 3/9

15:05-08:12

2 stops25h 07m

Seattle/Tacoma Intl

Thu 18/9

05:26-08:10

2 stops18h 44m

£491

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 4/9

18:40-21:22

2 stops34h 42m

Seattle/Tacoma Intl

Sat 13/9

16:20-17:50

1 stop17h 30m

£515

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 £397, 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 £415.

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 £585. 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 £694.

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 £521. 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 afternoon are often more expensive, with an average ticket price of £623.

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

Best price found	£389
Fastest flight time	13h 00m
Direct flights	None
Airports in Seattle	1 airport

The best one-way flight to Seattle from London Gatwick Airport in the past 72 hours is £389. The best return flight deal from London Gatwick Airport to Seattle found on momondo in the last 72 hours is £474.

The fastest flight from London Gatwick Airport to Seattle takes 13h 00m

There are no direct flights from London Gatwick Airport to Seattle. Popular non-direct route for this connection is London Gatwick Airport - Seattle/Tacoma Intl Airport.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

Search flight deals

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?
There are 2 operators available for flights from London Gatwick Airport to Seattle/Tacoma Intl Airport as of August 2025.
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?
Based on momondo bookings for flights between London Gatwick Airport and Seattle, the leading airline is Icelandair, making up 91% of the total bookings. Other popular airlines include Virgin Atlantic with 9%.

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
Icelandair	PriceFrom £322	Free Cancellation	Rating 7.0 527 reviews		Search Icelandair flights
Virgin Atlantic	PriceFrom £449	Free Cancellation	Rating 7.4 657 reviews		Search Virgin Atlantic flights

Kent

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Fife

Tukwila

Renton

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.