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$500+ Cheap flights from Gatwick (LGW) to Seattle (SEA)

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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$604
(Trip.com)

One-way from

$500
(Mytrip)

Popular in

August

Cheapest in

March

Average price

$623
From London Gatwick to Seattle/Tacoma Intl
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One-way flight from London Gatwick to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 14% potential increase in price ($121 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Gatwick to Seattle

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 September 11, 2025.

This Trip.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/163:40 pmLGW - SEA
1 stop13h 00mIcelandair
Mon 10/207:00 pmSEA - LGW
1 stop11h 35mIcelandair
Deal found 9/11$604
This Icelandair deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/73:40 pmLGW - SEA
1 stop13h 00mIcelandair
Mon 11/102:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 9/11$607
This oojo deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/183:40 pmLGW - SEA
1 stop13h 00mIcelandair
Fri 10/243:45 pmSEA - LGW
1 stop14h 55mIcelandair
Deal found 9/11$609
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/209:50 amLGW - SEA
2 stops59h 02mMultiple Airlines
Sat 10/49:39 pmSEA - LGW
1 stop29h 16mMultiple Airlines
Deal found 9/10$610
This Trip.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/43:40 pmLGW - SEA
1 stop13h 00mIcelandair
Tue 7/73:45 pmSEA - LGW
1 stop14h 55mIcelandair
Deal found 9/11$618
This Trip.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/223:40 pmLGW - SEA
1 stop13h 00mIcelandair
Mon 10/67:00 pmSEA - LGW
1 stop11h 35mIcelandair
Deal found 9/11$619
This Icelandair deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/111:55 amLGW - SEA
1 stop13h 05mIcelandair
Mon 11/102:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 9/11$624
This Gotogate deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/262:40 pmLGW - SEA
1 stop34h 20mIcelandair
Sun 11/22:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 9/11$625
This oojo deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/196:40 pmLGW - SEA
2 stops36h 35mSWISS
Wed 12/31:05 pmSEA - LGW
2 stops20h 45mSWISS
Deal found 9/11$627
This Booking.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/273:40 pmLGW - SEA
1 stop13h 00mIcelandair
Sat 11/13:35 pmSEA - LGW
1 stop12h 20mIcelandair
Deal found 9/10$628

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated September 11, 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

Tue 10/7

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Tue 11/11

2:35 pm-10:55 am

1 stop12h 20m

$607

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 10/18

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Fri 10/24

3:45 pm-2:40 pm

1 stop14h 55m

$609

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 10/4

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Tue 7/7

3:45 pm-2:40 pm

1 stop14h 55m

$618

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Fri 10/10

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Mon 11/3

2:35 pm-10:55 am

1 stop12h 20m

$630

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 10/9

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Sun 11/2

2:35 pm-10:55 am

1 stop12h 20m

$641

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 10/7

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Fri 11/7

2:35 pm-10:55 am

1 stop12h 20m

$641

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 10/8

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Sat 10/11

7:00 pm-2:35 pm

1 stop11h 35m

$641

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 10/4

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Fri 11/7

2:35 pm-10:55 am

1 stop12h 20m

$641

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 10/4

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Sat 11/1

3:35 pm-10:55 am

1 stop12h 20m

$656

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 10/19

3:40 pm-8:40 pm

1 stop13h 00m

Seattle/Tacoma Intl

Sun 11/23

2:35 pm-10:55 am

1 stop12h 20m

$663

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 19 results
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 round-trip 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, January is the cheapest month in which you can book a flight from London Gatwick Airport to Seattle (average of $238). Flying from London Gatwick Airport to Seattle in June is currently the most expensive (average of $388). 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 September 11, 2025.
Peruse reviews from past customers who have flown with Icelandair from London Gatwick Airport to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Icelandair
7.0
Good
546 reviews

Entertainment

7.0

Food

6.2

Boarding

7.1

Comfort

6.9

Overall

7.0

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

KEF - EWR

The airport in Reykjavik had too few seats at the departure gate. Otherwise the airport experience was fine. The flight was timely and smooth. The airplane was well maintained and staff pleasant and efficient
Icelandair
7.0
Good
546 reviews
Icelandair
7.0
Good
546 reviews

Entertainment

7.0

Food

6.2

Boarding

7.1

Comfort

6.9

Overall

7.0

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

KEF - EWR

The airport in Reykjavik had too few seats at the departure gate. Otherwise the airport experience was fine. The flight was timely and smooth. The airplane was well maintained and staff pleasant and efficient

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?

    There are many flights that can get you from London Gatwick Airport to Seattle in 13h. Fly via Icelandair to get the fastest option. London Gatwick Airport and Seattle are separated by a distance of 4807 mi.

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

    Currently priced at $402, Icelandair will fly you from London Gatwick Airport to Seattle and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Icelandair is 44% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 vacation 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, January is the cheapest month in which you can book a flight from London Gatwick Airport to Seattle (average of $238). Flying from London Gatwick Airport to Seattle in June is currently the most expensive (average of $388). 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

Traveling to a place near Seattle?

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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 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$402Average$907FlexibilityNo cancel feeOn-time76%

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