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Cheap flights from London Gatwick Airport to Seattle from £421

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 20/9. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SEA
11 Jul — 18 Jul1
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 11 June 2026.

Fri 25/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sun 28/214:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 9/6£518
Fri 25/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sat 13/314:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 11/6£518
Fri 10/717:00
LGW
-
SEA
1 stop32h 27m
Virgin Atlantic
Thu 30/713:30
SEA
-
LGW
1 stop11h 55m
Virgin Atlantic
Deal found 10/6£520
Tue 7/713:00
LGW
-
SEA
1 stop12h 55m
Icelandair
Tue 14/719:00
SEA
-
LGW
1 stop32h 45m
Icelandair
Deal found 9/6£521
Mon 14/917:00
LGW
-
SEA
1 stop26h 15m
Virgin Atlantic
Tue 22/913:30
SEA
-
LGW
1 stop11h 55m
Virgin Atlantic
Deal found 9/6£521
Sat 7/1116:45
LGW
-
SEA
2 stops26h 10m
Virgin Atlantic
Mon 7/1214:05
SEA
-
LGW
1 stop17h 40m
Virgin Atlantic
Deal found 11/6£523
Sun 12/717:00
LGW
-
SEA
1 stop26h 15m
Multiple Airlines
Wed 29/718:35
SEA
-
LGW
1 stop13h 25m
Multiple Airlines
Deal found 10/6£524
Wed 17/615:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Fri 17/723:25
SEA
-
LGW
1 stop28h 20m
Icelandair
Deal found 10/6£524
Thu 9/710:25
LGW
-
SEA
1 stop15h 02m
Multiple Airlines
Wed 29/718:35
SEA
-
LGW
1 stop13h 25m
Multiple Airlines
Deal found 10/6£525
Sun 13/1210:00
LGW
-
SEA
2 stops20h 12m
Virgin Atlantic
Wed 13/106:05
SEA
-
LGW
2 stops18h 55m
Virgin Atlantic
Deal found 8/6£526
Fri 11/1210:00
LGW
-
SEA
2 stops20h 11m
Virgin Atlantic
Mon 11/114:15
SEA
-
LGW
1 stop17h 30m
Virgin Atlantic
Deal found 10/6£527
Sat 26/920:40
LGW
-
SEA
2 stops32h 56m
Iberia
Thu 22/1006:23
SEA
-
LGW
2 stops20h 27m
Iberia
Deal found 10/6£528

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 11 June 2026.

Round-trip from

£518

One-way from

£421

Popular in

August

Cheapest in

January

Average price

£604
Icelandair
  • Icelandair
  • 25/9-2/3
  • 2 total stops
  • 25h 20m total
  • London to Seattle
Search Deals
20/9
  • 20/9
  • 1 total stop
  • 30h 13m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£68 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 11 June 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
Fastest return journey

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 4/7

10:25-17:27

1 stop15h 02m

Seattle/Tacoma Intl

Sat 11/7

13:30-09:20

1 stop11h 50m

£631

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 15/7

09:25-18:32

2 stops17h 07m

Seattle/Tacoma Intl

Mon 3/8

07:00-08:25

2 stops17h 25m

£699

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 4/7

10:25-23:59

2 stops21h 34m

Seattle/Tacoma Intl

Sat 11/7

13:30-09:20

1 stop11h 50m

£712

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 16/8

10:25-23:54

2 stops21h 29m

Seattle/Tacoma Intl

Mon 24/8

18:40-16:00

1 stop13h 20m

£716

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 28/8

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Sat 27/2

08:06-10:55

2 stops18h 49m

£724

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 29/8

15:40-11:45

1 stop28h 05m

Seattle/Tacoma Intl

Fri 26/2

18:50-10:55

2 stops32h 05m

£729

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 1/9

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Fri 26/2

18:50-10:55

2 stops32h 05m

£734

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 8/7

09:25-18:32

2 stops17h 07m

Seattle/Tacoma Intl

Wed 29/7

07:00-08:25

2 stops17h 25m

£741

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 2/7

10:20-20:37

2 stops18h 17m

Seattle/Tacoma Intl

Thu 9/7

18:05-18:50

1 stop16h 45m

£767

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 14/7

09:25-18:32

2 stops17h 07m

Seattle/Tacoma Intl

Tue 21/7

07:00-08:25

2 stops17h 25m

£773

Flights are sorted by cheapest return flights first.

Deals found on 7/6

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 11 June 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
672 reviews
Check prices

Boarding

7.2

Comfort

6.9

Crew

8.0

Overall

7.0

Entertainment

6.9

Food

6.2

Reviews

1 / 20
6.0
Good

William,Jun 2026

SEA - KEF

First time Iceland Air. Ridiculously small amount of leg room, flight was hotter than hades and people kept requesting for cooler air that never came. You pay for everything, no food of any kind unless you pay which I've never seen on a flight of this length. Just seemed like they are cheap as possible about everything. Won't fly with them again if I can avoid it.
Icelandair
7.0
Good
672 reviews
Icelandair
7.0
Good
672 reviews
Check prices

Boarding

7.2

Comfort

6.9

Crew

8.0

Overall

7.0

Entertainment

6.9

Food

6.2

Reviews

1 / 20
6.0
Good

William,Jun 2026

SEA - KEF

First time Iceland Air. Ridiculously small amount of leg room, flight was hotter than hades and people kept requesting for cooler air that never came. You pay for everything, no food of any kind unless you pay which I've never seen on a flight of this length. Just seemed like they are cheap as possible about everything. Won't fly with them again if I can avoid it.

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 02m. Delta provides one of the quickest options available for as low as £631. 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 £395. Icelandair is priced at 23% 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 11 June 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£395Average£554FlexibilityNo cancel feeOn-time76%
Search Icelandair flights

Fly with Cheapflights

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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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