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Cheap flights from Seattle to London Gatwick Airport from £278

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LGW
11 Mar — 18 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Gatwick

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Gatwick
Explore the most affordable flight options available from Seattle to Gatwick. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 February 2026.

Mon 13/419:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Mon 20/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 8/2£399
Tue 14/419:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Tue 21/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 6/2£401
Wed 29/419:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Fri 15/515:40
LGW
-
SEA
1 stop34h 15m
Icelandair
Deal found 8/2£402
Tue 14/419:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Tue 28/413:00
LGW
-
SEA
1 stop12h 55m
Icelandair
Deal found 8/2£402
Thu 16/419:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Fri 24/415:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 5/2£403
Sun 8/315:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Fri 13/311:55
LGW
-
SEA
1 stop13h 05m
Icelandair
Deal found 7/2£404
Sat 25/419:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Sun 10/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 9/2£405
Tue 10/315:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Tue 17/311:55
LGW
-
SEA
1 stop13h 05m
Icelandair
Deal found 8/2£405
Fri 27/214:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Wed 4/311:55
LGW
-
SEA
1 stop13h 05m
Icelandair
Deal found 6/2£406
Thu 23/419:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Sun 10/515:40
LGW
-
SEA
1 stop34h 15m
Icelandair
Deal found 5/2£407
Thu 23/419:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Wed 6/515:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 7/2£408

Find flight deals from Seattle to Gatwick

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Gatwick (LGW). 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 9 February 2026.

Round-trip from

£399

One-way from

£278

Popular in

June

Cheapest in

November

Average price

£416
Icelandair
  • Icelandair
  • 13/4-20/4
  • 2 total stops
  • 24h 40m total
  • Seattle to London
Search Deals
20/4
  • 20/4
  • 1 total stop
  • 23h 27m total
  • Seattle to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Seattle to Gatwick 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 9 February 2026.
Use the filters below to find and compare flights from Seattle to London Gatwick Airport that are best for you.

Fly from

Seattle

Fly to

Gatwick

Route

Depart

Return

Price

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 13/4

19:00-14:40

1 stop11h 40m

London Gatwick

Wed 22/4

15:40-20:40

1 stop13h 00m

£420

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 25/4

19:00-14:40

1 stop11h 40m

London Gatwick

Tue 5/5

13:00-17:55

1 stop12h 55m

£426

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 5/5

19:00-14:40

1 stop11h 40m

London Gatwick

Thu 14/5

13:00-17:55

1 stop12h 55m

£432

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 2/5

19:00-14:40

1 stop11h 40m

London Gatwick

Tue 12/5

13:00-17:55

1 stop12h 55m

£432

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 27/7

18:35-15:45

1 stop13h 10m

London Gatwick

Thu 13/8

10:25-17:34

1 stop15h 09m

£564

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 6/3

19:00-22:35

1 stop19h 35m

London Gatwick

Fri 20/3

05:55-18:05

1 stop19h 10m

£577

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 22/5

19:00-14:40

1 stop11h 40m

London Gatwick

Wed 3/6

15:40-20:40

1 stop13h 00m

£612

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 24/5

15:40-14:40

1 stop15h 00m

London Gatwick

Wed 3/6

15:40-20:40

1 stop13h 00m

£612

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 18/4

10:48-08:25

2 stops37h 37m

London Gatwick

Wed 29/4

09:15-22:37

2 stops21h 22m

£614

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 26/7

13:30-09:25

1 stop11h 55m

London Gatwick

Wed 12/8

10:25-17:34

1 stop15h 09m

£623

Flights are sorted by cheapest return flights first.

Deals found on 7/2

Showing 1-10 of 24 results
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Best time to book a flight from Seattle to Gatwick

Have a flexible travel schedule? Discover the best time to fly to Gatwick from Seattle 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 Seattle to London Gatwick Airport

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

Currently, February is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of £363). Flying from Seattle to London Gatwick Airport in June is currently the most expensive (average of £589). 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.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Gatwick. 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 from for flights from Seattle to London Gatwick?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to London Gatwick. On average, Seattle/Tacoma Intl has 0 outbound flights to London Gatwick per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

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

    For as low as £420, Icelandair can have you in London Gatwick Airport from Seattle in 11h 40m. The distance from Seattle to London Gatwick Airport is about 4807 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Gatwick 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 Seattle to London Gatwick Airport?

    Currently, February is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of £363). Flying from Seattle to London Gatwick Airport in June is currently the most expensive (average of £589). 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 London Gatwick Airport?

Book flights to London Gatwick Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames
Romford
Ipswich

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

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Gatwick flexibly with Cheapflights today.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Gatwick from Seattle today and book when prices fit your budget.

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