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

Icelandair is the most popular carrier 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 are refreshed on a daily basis.

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

As of October 2025, there is 1 operator available to choose from 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?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 travel and health documents you'll need for your trip to Seattle/Tacoma Intl 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 Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$547 Cheap Flights from London Gatwick Airport to Seattle in 2025/26

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Find the cheapest flights from London Gatwick Airport to Seattle

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

11:55 am - 5:00 pmLGW-SEA

13h 05m1 stop

2:35 pm - 10:55 amSEA-LGW

12h 20m1 stop

$591Icelandair

Find Deal

Wed, Nov 26 - Wed, Dec 3

11:55 am - 5:00 pmLGW-SEA

13h 05m1 stop

2:35 pm - 10:55 amSEA-LGW

12h 20m1 stop

$601Icelandair

Find Deal

Mon, Nov 17 - Thu, Nov 20

11:55 am - 5:00 pmLGW-SEA

13h 05m1 stop

2:35 pm - 10:55 amSEA-LGW

12h 20m1 stop

$603Icelandair

Find Deal

Mon, Nov 10 - Mon, Nov 24

11:55 am - 5:00 pmLGW-SEA

13h 05m1 stop

2:35 pm - 10:55 amSEA-LGW

12h 20m1 stop

$606Icelandair

Find Deal

Mon, Nov 10 - Mon, Nov 24

11:55 am - 5:00 pmLGW-SEA

13h 05m1 stop

2:35 pm - 10:55 amSEA-LGW

12h 20m1 stop

$613Icelandair

Find Deal

Tue, Nov 25 - Wed, Dec 10

11:55 am - 5:00 pmLGW-SEA

13h 05m1 stop

2:35 pm - 10:55 amSEA-LGW

12h 20m1 stop

$614Icelandair

Find Deal

Wed, Nov 12 - Wed, Nov 19

8:50 am - 5:00 pmLGW-SEA

16h 10m2 stops

2:35 pm - 5:20 pmSEA-LGW

18h 45m2 stops

$616Multiple Airlines

Find Deal

Wed, Nov 12 - Wed, Nov 19

6:40 pm - 10:32 pmLGW-SEA

34h 52m2 stops

11:00 am - 5:50 pmSEA-LGW

23h 50m2 stops

$652SWISS

Find Deal

Tue, Mar 10 - Tue, Mar 17

6:40 pm - 10:28 pmLGW-SEA

35h 48m2 stops

10:53 am - 5:50 pmSEA-LGW

22h 57m2 stops

$682SWISS

Find Deal

Thu, Nov 13 - Thu, Nov 27

6:40 pm - 10:32 pmLGW-SEA

35h 52m2 stops

11:00 am - 5:50 pmSEA-LGW

23h 50m2 stops

$687SWISS

Find Deal

Thu, Mar 5 - Tue, Mar 10

Icelandair flights from London Gatwick Airport to Seattle

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

Icelandair

Nov 26

LGW11:55 amLondon Gatwick

13h 05m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

Dec 3

SEA2:35 pmSeattle/Tacoma Intl

12h 20m

1 stop

LGW10:55 amLondon Gatwick

$591

Find similar

Icelandair

Nov 17

LGW11:55 amLondon Gatwick

13h 05m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

Nov 20

SEA2:35 pmSeattle/Tacoma Intl

12h 20m

1 stop

LGW10:55 amLondon Gatwick

$601

Find similar

Icelandair

Nov 10

LGW11:55 amLondon Gatwick

13h 05m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

Nov 24

SEA2:35 pmSeattle/Tacoma Intl

12h 20m

1 stop

LGW10:55 amLondon Gatwick

$603

Find similar

SWISS flights from London Gatwick Airport to Seattle

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

SWISS

Mar 10

LGW6:40 pmLondon Gatwick

34h 52m

2 stops

SEA10:32 pmSeattle/Tacoma Intl

Mar 17

SEA11:00 amSeattle/Tacoma Intl

23h 50m

2 stops

LGW5:50 pmLondon Gatwick

$652

Find similar

SWISS

Nov 13

LGW6:40 pmLondon Gatwick

35h 48m

2 stops

SEA10:28 pmSeattle/Tacoma Intl

Nov 27

SEA10:53 amSeattle/Tacoma Intl

22h 57m

2 stops

LGW5:50 pmLondon Gatwick

$682

Find similar

SWISS

Mar 5

LGW6:40 pmLondon Gatwick

35h 52m

2 stops

SEA10:32 pmSeattle/Tacoma Intl

Mar 10

SEA11:00 amSeattle/Tacoma Intl

23h 50m

2 stops

LGW5:50 pmLondon Gatwick

$687

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

Wed 11/26

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Wed 12/3

2:35 pm-10:55 am

1 stop12h 20m

$591

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 11/17

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Thu 11/20

2:35 pm-10:55 am

1 stop12h 20m

$601

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 11/10

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Mon 11/24

2:35 pm-10:55 am

1 stop12h 20m

$603

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 11/10

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Mon 11/24

2:35 pm-10:55 am

1 stop12h 20m

$606

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 11/25

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Wed 12/10

2:35 pm-10:55 am

1 stop12h 20m

$613

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 11/12

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Wed 11/19

2:35 pm-10:55 am

1 stop12h 20m

$614

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 11/12

8:50 am-5:00 pm

2 stops16h 10m

Seattle/Tacoma Intl

Wed 11/19

2:35 pm-5:20 pm

2 stops18h 45m

$616

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 3/10

6:40 pm-10:32 pm

2 stops34h 52m

Seattle/Tacoma Intl

Tue 3/17

11:00 am-5:50 pm

2 stops23h 50m

$652

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 11/13

6:40 pm-10:28 pm

2 stops35h 48m

Seattle/Tacoma Intl

Thu 11/27

10:53 am-5:50 pm

2 stops22h 57m

$682

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 3/5

6:40 pm-10:32 pm

2 stops35h 52m

Seattle/Tacoma Intl

Tue 3/10

11:00 am-5:50 pm

2 stops23h 50m

$687

Flights are sorted by cheapest round-trip 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?

In general, March is the cheapest month to fly from London Gatwick Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $538. If you don’t want to visit Seattle in March, then you should wait until April to fly from London Gatwick Airport, when ticket prices are also cheap, with an average price of $549.

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

On average, the least expensive day to fly to Seattle from London Gatwick Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $793. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from London Gatwick Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,028.

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

Flying to Seattle from London Gatwick Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $842 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $860. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 round-trip 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.

Search flight deals

How far is London Gatwick to Seattle/Tacoma Intl by plane?
A flight from London Gatwick to Seattle/Tacoma Intl will travel around 4798.7 mi. Typically, this will take 13h 05m by plane in normal conditions.
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 are refreshed on a daily basis.
How many operators does momondo search for flights from London Gatwick Airport to Seattle/Tacoma Intl Airport?
As of October 2025, there is 1 operator available to choose from 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?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 travel and health documents you'll need for your trip to Seattle/Tacoma Intl 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 Seattle/Tacoma Intl 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 London Gatwick Airport to Seattle?
Based on momondo bookings for flights between London Gatwick Airport and Seattle, the leading airline is Icelandair, making up 100% of the total bookings.

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 $418	Free Cancellation	Rating 7.0 556 reviews		Search Icelandair flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Federal Way

Tukwila

Kirkland

Fife

Centralia

Lakewood

Shoreline

Cle Elum

Redmond

Westport

Why use momondo?

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

It is quick and easy to find London to Seattle 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 Seattle that suits you.

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

momondo does allow users to show only those flights to Seattle from London which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from London.

I’m not ready to book a flight from London to Seattle right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seattle from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.