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Cheap flights from London Gatwick Airport to Seattle from £350

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 30/3. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SEA
20 Feb — 27 Feb1
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 21 January 2026.

Thu 30/409:25
LGW
-
SEA
2 stops22h 04m
SWISS
Tue 12/509:55
SEA
-
LGW
2 stops23h 55m
SWISS
Deal found 20/1£379
Tue 14/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Thu 4/619:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 20/1£380
Tue 3/311:55
LGW
-
SEA
1 stop13h 05m
Icelandair
Mon 16/315:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 20/1£381
Mon 24/809:15
LGW
-
SEA
1 stop13h 25m
SWISS
Sat 12/916:30
SEA
-
LGW
1 stop17h 20m
SWISS
Deal found 19/1£384
Thu 19/211:55
LGW
-
SEA
1 stop13h 05m
Icelandair
Thu 26/214:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Deal found 20/1£384
Tue 1/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Sat 12/915:40
SEA
-
LGW
1 stop12h 05m
Icelandair
Deal found 19/1£385
Tue 7/715:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Tue 21/719:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Deal found 20/1£387
Wed 1/715:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Tue 14/715:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 20/1£388
Sat 6/609:25
LGW
-
SEA
1 stop13h 10m
SWISS
Sat 20/616:30
SEA
-
LGW
1 stop31h 55m
SWISS
Deal found 19/1£390
Sat 16/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Tue 2/615:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Deal found 19/1£391

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 21 January 2026.

Round-trip from

£379

One-way from

£350

Popular in

August

Cheapest in

March

Average price

£444
SWISS
  • SWISS
  • 30/4-11/5
  • 4 total stops
  • 45h 59m total
  • London to Seattle
Search Deals
30/3
  • 30/3
  • 3 total stops
  • 47h 01m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£73 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 January 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 21 January 2026.
Use the filters below to find and compare flights from London Gatwick Airport to Seattle that are best for you.

Fly from

Gatwick

Fly to

Seattle

Route

Depart

Return

Price

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 1/5

09:25-23:29

2 stops22h 04m

Seattle/Tacoma Intl

Tue 12/5

09:55-17:50

2 stops23h 55m

£379

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 30/4

09:25-23:29

2 stops22h 04m

Seattle/Tacoma Intl

Tue 12/5

09:55-17:50

2 stops23h 55m

£379

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 2/7

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Sun 19/7

15:40-14:40

1 stop15h 00m

£412

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 5/2

11:55-17:00

1 stop13h 05m

Seattle/Tacoma Intl

Mon 9/2

14:35-10:55

1 stop12h 20m

£447

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 20/6

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Wed 8/7

15:40-14:40

1 stop15h 00m

£474

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 1/7

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Wed 8/7

15:40-11:45

1 stop12h 05m

£479

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 2/5

09:25-23:29

2 stops22h 04m

Seattle/Tacoma Intl

Mon 11/5

09:55-17:50

2 stops23h 55m

£512

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 14/5

13:05-22:00

1 stop16h 55m

Seattle/Tacoma Intl

Sat 23/5

07:05-09:15

2 stops18h 10m

£538

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 20/6

09:25-14:35

1 stop13h 10m

Seattle/Tacoma Intl

Wed 8/7

07:00-08:20

2 stops17h 20m

£538

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 10/3

11:55-18:00

1 stop13h 05m

Seattle/Tacoma Intl

Thu 12/3

15:35-10:55

1 stop12h 20m

£542

Flights are sorted by cheapest return flights first.

Deals found on 19/1

Showing 1-10 of 22 results
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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

What is the cheapest month to book a flight from London Gatwick Airport to Seattle?

Currently, March is the cheapest month in which you can book a flight from London Gatwick Airport to Seattle (average of £303). Flying from London Gatwick Airport to Seattle in August is currently the most expensive (average of £559). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 21 January 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
7.1
Good
602 reviews
Check prices

Crew

8.0

Overall

7.1

Boarding

7.2

Comfort

7.0

Entertainment

7.0

Food

6.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
Icelandair
7.1
Good
602 reviews
Icelandair
7.1
Good
602 reviews
Check prices

Crew

8.0

Overall

7.1

Boarding

7.2

Comfort

7.0

Entertainment

7.0

Food

6.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.

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 13h. SWISS provides one of the quickest options available for as low as £412. 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 £351. Icelandair is priced at 30% 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.

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

    Currently, March is the cheapest month in which you can book a flight from London Gatwick Airport to Seattle (average of £303). Flying from London Gatwick Airport to Seattle in August is currently the most expensive (average of £559). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 21 January 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£351Average£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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