LGW - SEA

$507 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 9/21. 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

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 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Gatwick to Seattle

Tue, Oct 28 - Sun, Nov 2
Icelandair Logo
11:55 am - 6:00 pmLGW-SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
$603Icelandair
Find Deal
Mon, Nov 3 - Sun, Nov 16
Multiple Airlines Logo
5:20 pm - 10:35 amLGW-SEA
49h 15m2 stops
Multiple Airlines Logo
9:34 pm - 6:00 amSEA-LGW
24h 26m1 stop
$610Multiple Airlines
Find Deal
Tue, Mar 10 - Tue, Mar 17
SWISS Logo
6:40 pm - 10:29 pmLGW-SEA
34h 49m2 stops
SWISS Logo
2:47 pm - 5:50 pmSEA-LGW
20h 03m2 stops
$611SWISS
Find Deal
Mon, Sep 29 - Mon, Oct 6
Icelandair Logo
3:40 pm - 8:40 pmLGW-SEA
13h 00m1 stop
Icelandair Logo
7:00 pm - 2:35 pmSEA-LGW
11h 35m1 stop
$612Icelandair
Find Deal
Mon, Nov 3 - Sun, Nov 16
SWISS Logo
6:40 pm - 10:45 pmLGW-SEA
36h 05m2 stops
SWISS Logo
2:40 pm - 5:50 pmSEA-LGW
19h 10m2 stops
$613SWISS
Find Deal
Sun, Oct 19 - Mon, Oct 27
Icelandair Logo
3:40 pm - 5:50 pmLGW-SEA
34h 10m1 stop
Icelandair Logo
3:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
$616Icelandair
Find Deal
Fri, Oct 10 - Tue, Oct 14
Icelandair Logo
3:40 pm - 8:40 pmLGW-SEA
13h 00m1 stop
Icelandair Logo
3:45 pm - 2:40 pmSEA-LGW
14h 55m1 stop
$617Icelandair
Find Deal
Thu, Nov 27 - Tue, Dec 2
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
$619Icelandair
Find Deal
Tue, Mar 10 - Tue, Mar 17
SWISS Logo
6:40 pm - 10:29 pmLGW-SEA
34h 49m2 stops
SWISS Logo
2:47 pm - 5:50 pmSEA-LGW
20h 03m2 stops
$632SWISS
Find Deal
Wed, Nov 12 - Sat, Nov 15
Multiple Airlines Logo
1:00 pm - 10:11 pmLGW-SEA
17h 11m1 stop
Multiple Airlines Logo
8:00 am - 6:00 amSEA-LGW
38h 00m2 stops
$638Multiple Airlines
Find Deal

Everything you should know

Top airlines
Icelandair
Cheapest • from $603 (round-trip)
Icelandair
Best reviews • 7.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
March
Cheapest • 25% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$603
Typical prices: $556-763
Icelandair
Tue 10/28Sun 11/2
LGW - SEA • 1 stop
Cheapest one-way
$507
Multiple Airlines
Sun 9/21
LGW - SEA • 2 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
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.

How much is a round-trip flight from London Gatwick Airport to Seattle?

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 $538 (return) on average. On the other hand, the most expensive months are August and December, where the average cost of round-trip tickets is $976 and $943 respectively.

Good to know

Low seasonOctober
Cheapest flight$507
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 31% 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 $507 for a one-way ticket and $603 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 is the only airline alliance operating flights between London Gatwick Airport and Seattle.

  • 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.

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.
7.0
IcelandairOverall score based on 544 reviews
7.2Boarding
8.0Crew
6.2Food
6.9Comfort
7.0Entertainment
Airline reviews

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.

4.0 OkayAnonymous, Sep 2025IAD - KEF
Read more Icelandair reviews

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.

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?

Comfort of seats is not good. Like sitting on a rock for 6 hours. Also no in flight food and limited beverages unless you pay is not nice. Need flight to be dark during the “night” but attendants don’t ask for shades to be lowered..

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

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

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