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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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SEA
11 Jan — 18 Jan1
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 12 December 2025.

Fri 26/1211:55LGW - SEA
1 stop13h 05mIcelandair
Tue 6/114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 10/12£633
Wed 24/1205:55LGW - SEA
2 stops17h 45mMultiple Airlines
Tue 6/110:04SEA - LGW
1 stop35h 56mMultiple Airlines
Deal found 11/12£696
Fri 26/1211:55LGW - SEA
1 stop13h 05mIcelandair
Tue 30/1214:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 10/12£775
Fri 26/1211:55LGW - SEA
1 stop13h 05mIcelandair
Wed 31/1214:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 11/12£792

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 12 December 2025.

Round-trip from

£456

One-way from

£397

Popular in

January

Cheapest in

April

Average price

£567
Icelandair
  • Icelandair
  • 18/4-22/4
  • 2 total stops
  • 24h 40m total
  • London to Seattle
Search Deals
15/3
  • 15/3
  • 1 total stop
  • 28h 28m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£89 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£35 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 12 December 2025.
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

Wed 21/1

11:55-20:39

2 stops16h 44m

Seattle/Tacoma Intl

Sun 25/1

14:35-10:55

1 stop12h 20m

£580

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 26/1

11:55-20:39

2 stops16h 44m

Seattle/Tacoma Intl

Thu 29/1

14:35-10:55

1 stop12h 20m

£580

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 17/1

18:40-21:12

2 stops34h 32m

Seattle/Tacoma Intl

Fri 30/1

12:35-17:50

2 stops21h 15m

£588

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 2/2

11:55-20:39

2 stops16h 44m

Seattle/Tacoma Intl

Sun 15/2

14:35-10:55

1 stop12h 20m

£589

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 2/2

11:55-20:39

2 stops16h 44m

Seattle/Tacoma Intl

Sun 15/2

14:35-10:55

1 stop12h 20m

£590

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 9/4

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Mon 13/4

19:55-14:40

2 stops34h 45m

£598

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 8/4

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Wed 15/4

23:10-14:40

2 stops31h 30m

£599

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 17/1

11:55-20:39

2 stops16h 44m

Seattle/Tacoma Intl

Sun 1/2

14:35-10:55

1 stop12h 20m

£603

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 25/1

13:00-10:26

1 stop29h 26m

Seattle/Tacoma Intl

Sun 1/2

17:59-06:00

2 stops28h 01m

£622

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 14/3

11:40-22:16

1 stop17h 36m

Seattle/Tacoma Intl

Sun 22/3

15:10-09:45

2 stops35h 35m

£633

Flights are sorted by cheapest return flights first.

Deals found on 10/12

Showing 1-10 of 21 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 £305). Flying from London Gatwick Airport to Seattle in August is currently the most expensive (average of £562). 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.

What is the cheapest time of day to fly from LGW to SEA?

Find hourly flight availability from Gatwick to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 28% on flights from London Gatwick Airport to Seattle by exploring options for tickets at midday.

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 12 December 2025.
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
589 reviews
Check prices

Boarding

7.2

Food

6.2

Entertainment

7.0

Crew

8.0

Comfort

6.9

Overall

7.0

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
7.0
Good
589 reviews
Icelandair
7.0
Good
589 reviews
Check prices

Boarding

7.2

Food

6.2

Entertainment

7.0

Crew

8.0

Comfort

6.9

Overall

7.0

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 16h 44m. Icelandair provides one of the quickest options available for as low as £580. 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 £326. Icelandair is priced at 41% 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 £305). Flying from London Gatwick Airport to Seattle in August is currently the most expensive (average of £562). 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
Leavenworth
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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£326Average£495FlexibilityNo 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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