LGW - SEA

$334 Find Cheap Flights from London Gatwick Airport to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Gatwick to Seattle departing on 6/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Seattle, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Gatwick to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Gatwick to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Gatwick to Seattle

KAYAK's recommended round-trip deals from the most popular airlines that fly from Gatwick to Seattle.
Discover the best prices for you by selecting your travel dates on KAYAK.
Icelandair Logo
3:40 pm - 8:40 pmLGW-SEA
13h 00m1 stop
Icelandair Logo
3:45 pm - 2:40 pmSEA-LGW
14h 55m1 stop
$528Icelandair
Find Deal
Sat, May 10 - Fri, May 16
Icelandair Logo
3:40 pm - 8:40 pmLGW-SEA
13h 00m1 stop
Icelandair Logo
3:45 pm - 11:45 amSEA-LGW
12h 00m1 stop
$529Icelandair
Find Deal
Mon, May 12 - Fri, May 16
SWISS Logo
6:35 pm - 9:31 pmLGW-SEA
34h 56m2 stops
SWISS Logo
12:45 pm - 5:50 pmSEA-LGW
45h 05m2 stops
$641SWISS
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Tue, May 13 - Sun, May 18
Logo
10:45 am - 12:10 amLGW-SEA
21h 25m2 stops
Logo
7:00 pm - 8:10 pmSEA-LGW
17h 10m2 stops
$671
Find Deal
Mon, Jun 2 - Tue, Oct 14
Logo
8:50 pm - 12:25 pmLGW-SEA
23h 35m2 stops
Logo
2:15 pm - 8:35 pmSEA-LGW
22h 20m3 stops
$682
Find Deal
Tue, May 13 - Sun, May 18
Finnair Logo
12:20 pm - 12:45 amLGW-SEA
20h 25m2 stops
Finnair Logo
10:10 pm - 8:35 amSEA-LGW
26h 25m2 stops
$710Finnair
Find Deal
Mon, May 12 - Fri, May 23
Finnair Logo
12:20 pm - 12:44 amLGW-SEA
20h 24m2 stops
Finnair Logo
8:01 pm - 8:35 amSEA-LGW
28h 34m2 stops
$722Finnair
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Tue, Jun 10 - Wed, Jun 18
Delta Logo
12:00 pm - 7:55 amLGW-SEA
27h 55m2 stops
Delta Logo
7:20 am - 10:00 amSEA-LGW
42h 40m2 stops
$737Delta
Find Deal
Tue, Jun 17 - Sun, Jun 22
Delta Logo
12:00 pm - 12:04 amLGW-SEA
20h 04m2 stops
Delta Logo
7:20 am - 10:00 amSEA-LGW
42h 40m2 stops
$777Delta
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Tue, Jun 17 - Sat, Jun 21
SWISS Logo
6:40 pm - 6:49 pmLGW-SEA
32h 09m2 stops
SWISS Logo
1:45 pm - 5:50 pmSEA-LGW
20h 05m2 stops
$781SWISS
Find Deal
Sun, Sep 7 - Fri, Sep 19
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KAYAK's insights & trends for Gatwick to Seattle flights

Get data-powered insights and trends into flights from Gatwick to Seattle to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from London Gatwick Airport to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Gatwick Airport to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Gatwick Airport to Seattle is February, where tickets cost $583 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is $1,212 and $918 respectively.

How far in advance should I book a flight from London Gatwick Airport to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Gatwick Airport to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London Gatwick Airport to Seattle, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

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Good to know

Low seasonJanuary
High seasonDecember
Cheapest flight$334
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from London Gatwick Airport to Seattle

When to book flights from Gatwick to Seattle

Are your dates flexible? Find out the best times to travel from Gatwick to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking London Gatwick Airport to Seattle flights

  • What is the cheapest flight from London Gatwick Airport to Seattle?

    In the last 3 days, the lowest price for a flight from London Gatwick Airport to Seattle was $334 for a one-way ticket and $528 for a round-trip.

  • Do I need a passport to fly between London Gatwick Airport and Seattle?

    Yes, you'll most likely have to show a valid passport before boarding the plane in London Gatwick Airport and on arrival in Seattle.

  • Which airports will I be using when flying from London Gatwick Airport to Seattle?

    London Gatwick Airport airport is called London Gatwick and the only airport in Seattle is Seattle/Tacoma Intl.

  • Which aircraft models fly most regularly from London Gatwick Airport to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London Gatwick Airport to Seattle?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between London Gatwick Airport and Seattle, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from London Gatwick Airport to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Gatwick Airport to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Gatwick Airport to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from London Gatwick Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Gatwick Airport to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to London Gatwick Airport with another airline. Booking your flights between London Gatwick Airport and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Gatwick Airport to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from London Gatwick Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from Gatwick to Seattle

 
See real verified KAYAK customer reviews for airlines flying from London to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Gatwick to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.0
IcelandairOverall score based on 487 reviews
7.1Entertainment
8.0Crew
7.1Boarding
6.3Food
7.0Comfort
Airline reviews

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

10.0 ExcellentJames, Apr 2025MAN - KEF
Read more Icelandair reviews

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

No food was served for 7.5 hrs flight. When our flight changed to other airlines due to wether issue, our seats booked with no checked in luggage when I already payed for. We end up to pay 90 euro per suitcase.

The flights were in time and the bags arrived. well done

Only serving 2 small coffee in 7.5 hrs flight with very limited choice to order food.

Booked with Kayak… Economy Class it said. I had filtered for 1 checked bag. Get to boarding and it says I have Economy Light w/ no checked bags. $136 each way for baggage now. Do not use smartfares.com. Very misleading and a terrible start to this trip.

Overall good. I was surprised how easy it was to get from plain to plain in such a short time. Food choices were not so great and quite expensive. Entertainment was ok. Flights were smooth.

Horrible. The flight was delayed by over 3 hours but updates were barely provided. Boarding started 3 hours late then stopped because their system crashed. So now, passengers were standing for 15 minutes in the open waiting to get boarding passes scanned and get on a bus. Duty-free closed around 4-4:30. Only 1 food outlet was open and it was super slow and busy since it was serving passengers from multiple flights. So a number of passengers couldn't buy meals at the terminal. Since the flight was delayed by over 3 hours, we could have been offered snacks on-board. Nothing. The seats barely reclined. In-flight entertainment options were pitiful. Overall, a miserable experience. Never flying on Icelandair ever again. :(

Bad. Flights were late, by hours. No clear information was provided even until the delayed boarding time.

Everything you need to know for your flight from Gatwick to Seattle

Information on your arrival and departure airports

Seattle (SEA)
London Gatwick Airport (LGW)

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