SEA - LGW

$271 Find Cheap Flights from Seattle to London Gatwick Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Gatwick departing on 10/17. 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 London Gatwick Airport

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

Cheap Flights from Seattle to Gatwick (SEA-LGW)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Gatwick 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 Seattle to Gatwick

Fri, Oct 24 - Sun, Nov 2
Icelandair Logo
7:00 pm - 2:40 pmSEA-LGW
11h 40m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
$508Icelandair
Find Deal
Tue, Mar 3 - Wed, Apr 15
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
3:40 pm - 9:10 pmLGW-SEA
13h 30m1 stop
$510Icelandair
Find Deal
Sun, Feb 15 - Fri, Feb 20
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
$511Icelandair
Find Deal
Sun, Mar 8 - Wed, Mar 18
Icelandair Logo
3:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 am - 6:00 pmLGW-SEA
13h 05m1 stop
$513Icelandair
Find Deal
Mon, Dec 1 - Sun, Dec 14
Multiple Airlines Logo
2:35 pm - 5:20 pmSEA-LGW
18h 45m2 stops
Multiple Airlines Logo
8:25 am - 5:00 pmLGW-SEA
16h 35m2 stops
$514Multiple Airlines
Find Deal
Fri, Nov 7 - Sat, Nov 22
Icelandair Logo
2:35 pm - 10:55 amSEA-LGW
12h 20m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-SEA
13h 05m1 stop
$518Icelandair
Find Deal
Fri, Oct 3 - Tue, Oct 14
Icelandair Logo
3:45 pm - 2:40 pmSEA-LGW
14h 55m1 stop
Icelandair Logo
3:40 pm - 5:50 pmLGW-SEA
34h 10m1 stop
$520Icelandair
Find Deal
Tue, Nov 18 - Wed, Dec 3
SWISS Logo
1:20 pm - 5:50 pmSEA-LGW
20h 30m2 stops
SWISS Logo
6:40 pm - 11:15 pmLGW-SEA
36h 35m2 stops
$535SWISS
Find Deal
Tue, Nov 11 - Mon, Nov 17
SWISS Logo
3:37 pm - 5:50 pmSEA-LGW
18h 13m2 stops
SWISS Logo
6:40 pm - 8:51 pmLGW-SEA
34h 11m2 stops
$540SWISS
Find Deal
Thu, Nov 27 - Thu, Dec 4
SWISS Logo
10:53 am - 5:50 pmSEA-LGW
22h 57m2 stops
SWISS Logo
6:40 pm - 11:15 pmLGW-SEA
36h 35m2 stops
$585SWISS
Find Deal

Everything you should know

Top airlines
Icelandair
Cheapest • from $508 (round-trip)
Icelandair
Best reviews • 7.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 17% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$508
Overall average: $711
Icelandair
Fri 10/24Sun 11/2
SEA - LGW • 1 stop
Cheapest one-way
$271
Typical prices: $203-403
WestJet
Fri 10/17
SEA - LGW • 3 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Gatwick!
Booking Insights

KAYAK's insights & trends for Seattle to Gatwick flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to London Gatwick Airport, 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 Seattle to London Gatwick Airport is January, where tickets cost $557 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $879 and $755 respectively.

Good to know

Low seasonMarch
Cheapest flight$271
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from Seattle to London Gatwick Airport

When to book flights from Seattle to Gatwick

Are your dates flexible? Find out the best times to travel from Seattle to Gatwick 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 Seattle to London Gatwick Airport flights

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

    In the last 3 days, the lowest price for a flight from Seattle to London Gatwick Airport was $271 for a one-way ticket and $508 for a round-trip.

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

    Yes, you’ll need a passport to travel to London Gatwick Airport from Seattle.

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

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

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

    Star Alliance is the only airline alliance operating flights between Seattle and London Gatwick Airport.

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

    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 Seattle to London Gatwick Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Gatwick Airport from Seattle 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 Seattle to London Gatwick Airport?

    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 London Gatwick Airport with an airline and back to Seattle with another airline. Booking your flights between Seattle and LGW 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 Seattle to London Gatwick Airport?

    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 London Gatwick Airport from Seattle 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 Seattle to Gatwick

 
See real verified KAYAK customer reviews for airlines flying from Seattle to London. 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 Seattle to Gatwick? 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
7.0Entertainment
6.2Food
6.9Comfort
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.

Seat was hard and uncomfortable and the temperature too warm and uncomfortable.

I flew Icelandair with my partner from Prague to the US. Overall flight time was around 12 hours, with a connecting flight in Iceland. I have flown internationally for years and with multiple airlines. Every airline serves you a meal when traveling internationally. Icelandair not only did not offer an inclusive meal, but they did not even offer a snack. The only things they served over our long flight was water and coffee. Ridiculous! Never again will I fly with Icelandair.

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!

Worst airline I’ve ever flown. Delayed 5.5 hrs, missed connecting flight, and missed an entire day of vacation. Zero customer service

Everything sucked. No food, one small glass of water, a tiny coffee, 5.5 hour delay with no customer service. Would never recommend flying them.

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.

There was no lounge at Boston for us to use. Typically flying first class overseas comes with lounge privileges. The seats did not recline even a little. My headset only worked on one side. I felt like I was flying on Ryan Air, not Icelandic Air.

The flight was delayed and as a consequence we missed our connecting flight. Were stuck for another 6h in Reykyavik. Appreciated that we got a generous food voucher at least. Would have liked to see more information upon arrival including a person waiting for connecting flight travellers and informing already that we will not catch the flight and directing us to the office dealing with the matter; unfortunately that didnt happen and we hence first needed to find out whether flight had indeed left already and then locate the adequate office to help us with booking us on the next connecting flight. Also my suitcase broke and it is not clear whether it is happened on the leg with Iceland Air from DC to Reykyavik or on the leg with Lufthansa from Reykyavik to Frankfurt. Finally, understood that it is a low cost company but at least provision of earplugs for free would have been nice, instead of making them buy.

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.

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