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Cheap flights from London Gatwick Airport to Seattle from £397

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/6. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SEA
28 May — 4 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Gatwick to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Gatwick to Seattle
Explore the most affordable flight options available from Gatwick to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 April 2026.

Wed 24/615:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Fri 10/715:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 23/4£520
Tue 30/615:40
LGW
-
SEA
1 stop28h 05m
Icelandair
Thu 9/719:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 23/4£521
Fri 26/615:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sun 5/719:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 26/4£521
Sun 28/613:00
LGW
-
SEA
1 stop30h 45m
Icelandair
Tue 7/719:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 26/4£522
Wed 29/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Fri 8/519:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 24/4£524
Sat 9/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Tue 23/623:25
SEA
-
LGW
1 stop28h 20m
Icelandair
Deal found 27/4£526
Mon 1/615:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Mon 22/623:25
SEA
-
LGW
1 stop31h 15m
Icelandair
Deal found 23/4£526
Mon 4/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Fri 8/519:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 25/4£527
Sun 3/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Wed 13/519:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 25/4£529
Sat 2/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Thu 7/519:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 24/4£529
Thu 30/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Mon 4/515:40
SEA
-
LGW
1 stop12h 05m
Icelandair
Deal found 26/4£530
Sun 20/915:40
LGW
-
SEA
1 stop34h 15m
Icelandair
Tue 29/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 24/4£531

Find flight deals from Gatwick to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Gatwick (LGW) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 April 2026.

Round-trip from

£520

One-way from

£397

Popular in

June

Cheapest in

January

Average price

£518
Icelandair
  • Icelandair
  • 24/6-10/7
  • 2 total stops
  • 28h 00m total
  • London to Seattle
Search Deals
15/6
  • 15/6
  • 2 total stops
  • 41h 30m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£96 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Gatwick 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, Cheapflights users made 858,174 searches. Data last updated 28 April 2026.
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

Cheapest return flight

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 28/6

13:00-11:45

1 stop30h 45m

Seattle/Tacoma Intl

Fri 10/7

15:40-14:40

1 stop15h 00m

£522
Fastest return journey

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 9/5

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Mon 11/5

19:00-14:40

1 stop11h 40m

£602

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 22/7

10:25-23:58

2 stops21h 33m

Seattle/Tacoma Intl

Thu 6/8

13:30-09:25

1 stop11h 55m

£608

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 23/5

10:25-17:39

1 stop15h 14m

Seattle/Tacoma Intl

Tue 26/5

18:40-16:00

1 stop13h 20m

£618

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 24/8

10:25-17:34

1 stop15h 09m

Seattle/Tacoma Intl

Tue 1/9

13:30-09:25

1 stop11h 55m

£627

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 1/7

10:25-17:27

1 stop15h 02m

Seattle/Tacoma Intl

Wed 8/7

18:35-16:00

1 stop13h 25m

£634

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 12/9

15:40-11:45

1 stop28h 05m

Seattle/Tacoma Intl

Sat 19/9

19:00-14:40

1 stop11h 40m

£636

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 28/7

10:35-23:58

2 stops21h 23m

Seattle/Tacoma Intl

Mon 10/8

13:30-16:00

1 stop18h 30m

£637

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 8/9

09:25-20:43

2 stops19h 18m

Seattle/Tacoma Intl

Wed 23/9

07:00-08:25

2 stops17h 25m

£650

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 9/9

09:20-18:32

2 stops17h 12m

Seattle/Tacoma Intl

Tue 22/9

07:00-08:25

2 stops17h 25m

£690

Flights are sorted by cheapest return flights first.

Deals found on 22/4

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Gatwick to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Gatwick with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Gatwick Airport to Seattle

How much does it cost for a return flight from London Gatwick Airport to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 28 April 2026.
Get a feel of what it's like to fly with Icelandair from London Gatwick Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Icelandair
7.0
Good
644 reviews
Check prices

Boarding

7.2

Food

6.2

Comfort

6.9

Crew

8.0

Overall

7.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.
Icelandair
7.0
Good
644 reviews
Icelandair
7.0
Good
644 reviews
Check prices

Boarding

7.2

Food

6.2

Comfort

6.9

Crew

8.0

Overall

7.0

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.

Related info for your journey

Find useful and relevant information for your journey from Gatwick to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from London Gatwick?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from London Gatwick to Seattle. 1 airline have flights to Seattle/Tacoma Intl from London Gatwick on a regular basis. Booking flights from London Gatwick to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 0 inbound flights from London Gatwick per day.

  • How long is the flight from London Gatwick Airport to Seattle?

    A quick flight from London Gatwick Airport to Seattle can take about 15h 14m. Icelandair provides one of the quickest options available for as low as £618. London Gatwick Airport and Seattle are separated by a distance of 4807 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from London Gatwick Airport to Seattle round-trip?

    Flying on Icelandair is currently your cheapest option to Seattle, with prices starting at £374. Icelandair is priced at 29% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Gatwick to Seattle that include hotel bookings?

    Yes. In addition to deals on Gatwick to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Gatwick to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Gatwick to Seattle.

  • Can I find deals for business class flights from Gatwick to Seattle?

    Yes. Cheapflights offers flight deals from Gatwick to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Federal Way
SeaTac

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Top airline flying from Gatwick to Seattle

Discover the top airline that operate flights from Gatwick to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 28 April 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£374Average£494FlexibilityNo cancel feeOn-time76%
Search Icelandair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Gatwick to Seattle?

When you search for this flight from Gatwick to Seattle, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Gatwick to Seattle?

Cheapflights simply makes it quick and affordable to book flights from Gatwick to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Gatwick to Seattle with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Gatwick to Seattle, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Gatwick to Seattle become cheaper?

Of course! You can now track prices for flights from Gatwick to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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