LGW - SEA

£417 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 12/12. 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.
1 adult
1 adult, Economy, 0 bags

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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Flight Deals

Cheap Flights from Gatwick to Seattle (LGW-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Gatwick to Seattle

Tue, 24 Mar - Tue, 14 Apr
Icelandair Logo
11:55 - 18:00LGW-SEA
13h 05m1 stop
Icelandair Logo
15:45 - 14:40SEA-LGW
14h 55m1 stop
£446Icelandair
Find Deal
Wed, 3 Dec - Thu, 11 Dec
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£448Icelandair
Find Deal
Mon, 16 Feb - Tue, 24 Feb
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£452Icelandair
Find Deal
Tue, 10 Mar - Tue, 17 Mar
Icelandair Logo
11:55 - 18:00LGW-SEA
13h 05m1 stop
Icelandair Logo
15:35 - 10:55SEA-LGW
12h 20m1 stop
£453Icelandair
Find Deal
Tue, 9 Dec - Wed, 4 Mar
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£460Icelandair
Find Deal
Wed, 12 Nov - Wed, 19 Nov
Icelandair Logo
11:55 - 17:00LGW-SEA
13h 05m1 stop
Icelandair Logo
14:35 - 10:55SEA-LGW
12h 20m1 stop
£460Icelandair
Find Deal
Mon, 8 Dec - Mon, 15 Dec
Multiple Airlines Logo
09:00 - 18:20LGW-SEA
17h 20m1 stop
Multiple Airlines Logo
20:05 - 17:20SEA-LGW
13h 15m1 stop
£482Multiple Airlines
Find Deal
Tue, 10 Mar - Tue, 17 Mar
SWISS Logo
18:40 - 22:32LGW-SEA
34h 52m2 stops
SWISS Logo
11:00 - 17:50SEA-LGW
23h 50m2 stops
£528SWISS
Find Deal
Tue, 10 Mar - Tue, 17 Mar
SWISS Logo
18:40 - 22:32LGW-SEA
34h 52m2 stops
SWISS Logo
11:00 - 17:50SEA-LGW
23h 50m2 stops
£529SWISS
Find Deal
Tue, 10 Mar - Tue, 17 Mar
SWISS Logo
18:40 - 22:32LGW-SEA
34h 52m2 stops
SWISS Logo
11:00 - 17:50SEA-LGW
23h 50m2 stops
£536SWISS
Find Deal

Everything you should know

Top airlines
Icelandair
Cheapest • from £446 (return)
Icelandair
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
March
Cheapest • 24% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
£446
Overall average: £404
Icelandair
Tue 24/3Tue 14/4
LGW - SEA • 1 stop
Cheapest one-way flight
£417
Multiple Airlines
Fri 12/12
LGW - SEA • 2 stops
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KAYAK searches hundreds of sites at once to find you the best travel deals.
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Booking Insights

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 March, where tickets cost £404 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is £733 and £677 respectively.

Good to know - Cheap tickets from London Gatwick Airport to Seattle

Low seasonOctober
Cheapest flight£417
Best time to beat the crowds (16% less expensive on average)
Most popular time to fly (26% more expensive on average)
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 return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 £417 for a one-way ticket and £446 for a return.

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

    We unfortunately don’t have that data for this specific 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 travellers 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 return ticket. You could then fly to Seattle with an airline and back to London Gatwick Airport with another airline.

  • 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.

Reviews of the 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.
7.1
IcelandairOverall score based on 562 reviews
8.1Crew
6.2Food
7.2Boarding
7.0Entertainment
6.9Comfort
Airline reviews

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

8.0 ExcellentAnonymous, Oct 2025KEF - SEA
Read more Icelandair reviews

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

Service was excellent. Food and drinks were very good except for a greasy lump of a donut at the end of the flight that left us both feeling internally disgusted.

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

No meals included on this long international flight. Most airlines will offer you a meal when flying internationally. Not Icelandair. Your included choices are water and coffee. Poor customer service. The airport was also very confusing.

Best smelling onboard bathrooms ever. Even after use the whole flight. Biggest overhead bins. Most legroom in economy class. Great Icelandiic music. Really nice staff. Icelandair is awesome! (Don’t fly Air Canada! During the strike they lied about no flights available (I booked this flight myself) and hid the process to get money back on their website by obscuring menu titles, then made it difficult and time consuming to fill out. I’m Canadian. Don’t trust Air Canada!

The crew was wonderful at check in, the gate and on board. Felt the luggage had more room than the passengers. The seats were smaller than most domestic U.S. airlines. I'm only 5'2" and I had little legroom. There were only 2 bathrooms in coach. Needed more. The flight was very smooth but not the most comfortable.

Great experience on Icelandair flight from Newark to Amsterdam by way of Reykjavík. Courteous and professional staff. Food was solid. Service - outstanding. Cabin was a little warm.

Everything was good. Only issue comes from being vegan and flying. The food options are super limited.

Overall good for an economy fare. IMO the movie selection could be improved. Great that you can now connect bluetooth headphones to the entertainment system.

For a four hour flight, I was disappointed that everything was for purchase except for coffee, tea, or water. The disembarking in Iceland was so inefficient and time-consuming. We landed and stopped in the middle of the tarmac, had to disembark in the rain, and then squeeze into a bus which took us to the airport. Crazy! How does that work in winter?

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

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