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Cheap flights from London Gatwick Airport to Seattle from $548

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 2/19. 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 London Gatwick Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
3:40 pm - 8:45 pmLGW-SEA
13h 05m1 stop
Icelandair Logo
7:00 pm - 2:40 pmSEA-LGW
11h 40m1 stop
$612Icelandair
Find Deal
Wed, Apr 8 - Wed, Apr 15
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
$624Icelandair
Find Deal
Wed, Nov 26 - Thu, Dec 4
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
$627Icelandair
Find Deal
Wed, Dec 3 - Tue, Dec 9
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
$628Icelandair
Find Deal
Wed, Nov 19 - Mon, Nov 24
Icelandair Logo
3:40 pm - 5:50 pmLGW-SEA
34h 10m1 stop
Icelandair Logo
3:45 pm - 2:40 pmSEA-LGW
14h 55m1 stop
$629Icelandair
Find Deal
Thu, Apr 9 - Mon, Apr 13
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
$631Icelandair
Find Deal
Tue, Dec 2 - Tue, Dec 9
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
$633Icelandair
Find Deal
Wed, Dec 10 - Sat, Feb 28
American Airlines Logo
11:20 am - 11:45 amLGW-SEA
32h 25m2 stops
American Airlines Logo
6:00 am - 7:30 amSEA-LGW
17h 30m2 stops
$637American Airlines
Find Deal
Thu, Jan 8 - Thu, Jan 22
Multiple Airlines Logo
2:00 pm - 11:53 amLGW-SEA
29h 53m2 stops
Multiple Airlines Logo
6:06 am - 6:00 amSEA-LGW
15h 54m1 stop
$665Multiple Airlines
Find Deal
Thu, Dec 4 - Sun, Dec 7
American Airlines Logo
12:20 pm - 12:52 amLGW-SEA
20h 32m2 stops
American Airlines Logo
5:47 am - 10:40 amSEA-LGW
20h 53m2 stops
$700American Airlines
Find Deal
Fri, May 1 - Wed, May 20

Icelandair flights from London Gatwick Airport to Seattle

Our best Icelandair deals on London Gatwick Airport to Seattle flight tickets
Icelandair
Apr 8
LGW3:40 pmLondon Gatwick
13h 05m
1 stop
SEA8:45 pmSeattle/Tacoma Intl
Apr 15
SEA7:00 pmSeattle/Tacoma Intl
11h 40m
1 stop
LGW2:40 pmLondon Gatwick
$612
Find similar
Icelandair
Nov 12
LGW11:55 amLondon Gatwick
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
Dec 31
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 amLondon Gatwick
$618
Find similar
Icelandair
Nov 14
LGW11:55 amLondon Gatwick
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
Nov 17
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
LGW10:55 amLondon Gatwick
$619
Find similar

American Airlines flights from London Gatwick Airport to Seattle

Our best American Airlines deals on London Gatwick Airport to Seattle flight tickets
American Airlines
Jan 8
LGW11:20 amLondon Gatwick
32h 25m
2 stops
SEA11:45 amSeattle/Tacoma Intl
Jan 22
SEA6:00 amSeattle/Tacoma Intl
17h 30m
2 stops
LGW7:30 amLondon Gatwick
$637
Find similar
American Airlines
May 1
LGW12:20 pmLondon Gatwick
20h 32m
2 stops
SEA12:52 amSeattle/Tacoma Intl
May 20
SEA5:47 amSeattle/Tacoma Intl
20h 53m
2 stops
LGW10:40 amLondon Gatwick
$700
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated November 5, 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 4/8

3:40 pm-8:45 pm

1 stop13h 05m

Seattle/Tacoma Intl

Wed 4/15

7:00 pm-2:40 pm

1 stop11h 40m

$612

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 11/26

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Thu 12/4

2:35 pm-10:55 am

1 stop12h 20m

$624

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 12/3

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Tue 12/9

2:35 pm-10:55 am

1 stop12h 20m

$627

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 11/19

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Mon 11/24

2:35 pm-10:55 am

1 stop12h 20m

$628

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 4/9

3:40 pm-5:50 pm

1 stop34h 10m

Seattle/Tacoma Intl

Mon 4/13

3:45 pm-2:40 pm

1 stop14h 55m

$629

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 12/2

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Tue 12/9

2:35 pm-10:55 am

1 stop12h 20m

$631

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 12/10

11:55 am-5:00 pm

1 stop13h 05m

Seattle/Tacoma Intl

Sat 2/28

2:35 pm-10:55 am

1 stop12h 20m

$633

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 1/8

11:20 am-11:45 am

2 stops32h 25m

Seattle/Tacoma Intl

Thu 1/22

6:00 am-7:30 am

2 stops17h 30m

$637

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 12/4

2:00 pm-11:53 am

2 stops29h 53m

Seattle/Tacoma Intl

Sun 12/7

6:06 am-6:00 am

1 stop15h 54m

$665

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 5/1

12:20 pm-12:52 am

2 stops20h 32m

Seattle/Tacoma Intl

Wed 5/20

5:47 am-10:40 am

2 stops20h 53m

$700

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 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?

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 $766. 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 $1,019.

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

Flying to Seattle from London Gatwick Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $827 when looking at flights departing in the afternoon. 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.

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

You could potentially save up to 43% 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 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.
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  • 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?

  • 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?

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 $418Free CancellationRating
7.1
571 reviews
Search Icelandair flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Puyallup
Marysville
Redmond
Tukwila
Lakewood
Federal Way
Fife
Cle Elum
Centralia
Kirkland
Westport
Shoreline

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.

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