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Cheap flights from Seattle to London Gatwick Airport from £255

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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LGW
24 Nov — 1 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 25 October 2025.

Tue 4/1114:35SEA - LGW
1 stop12h 20mIcelandair
Tue 25/1111:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 23/10£388
Wed 19/1114:35SEA - LGW
1 stop12h 20mIcelandair
Mon 15/1211:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 23/10£389
Mon 8/1214:35SEA - LGW
1 stop12h 20mIcelandair
Mon 15/1211:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 23/10£394
Sun 7/1214:35SEA - LGW
1 stop12h 20mIcelandair
Mon 15/1211:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 23/10£403
Tue 25/1108:10SEA - LGW
2 stops18h 40mMultiple Airlines
Wed 3/1218:55LGW - SEA
2 stops25h 15mMultiple Airlines
Deal found 23/10£414
Thu 20/1114:35SEA - LGW
1 stop12h 20mIcelandair
Thu 27/1111:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 24/10£418
Mon 3/1114:35SEA - LGW
1 stop12h 20mIcelandair
Sun 23/1111:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 23/10£419
Tue 30/1214:35SEA - LGW
1 stop12h 20mIcelandair
Sun 11/111:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 24/10£422
Tue 4/1114:00SEA - LGW
2 stops21h 30mMultiple Airlines
Tue 11/1121:40LGW - SEA
2 stops32h 36mMultiple Airlines
Deal found 23/10£423
Wed 12/1120:05SEA - LGW
1 stop14h 50mMultiple Airlines
Sun 16/1108:25LGW - SEA
1 stop17h 55mMultiple Airlines
Deal found 24/10£426
Mon 8/1214:35SEA - LGW
1 stop12h 20mIcelandair
Tue 16/1211:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 22/10£426

Cheap 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 25 October 2025.

Round-trip from

£388

One-way from

£255

Popular in

June

Cheapest in

January

Average price

£487
Icelandair
  • Icelandair
  • 2/3-9/3
  • 2 total stops
  • 25h 25m total
  • Seattle to London
Search Deals
Icelandair
  • Icelandair
  • 11/11
  • 1 total stop
  • 12h 20m total
  • Seattle to London
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£57 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
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 25 October 2025.
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

Thu 5/3

14:35-10:55

1 stop12h 20m

London Gatwick

Wed 11/3

11:55-18:00

1 stop13h 05m

£388

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 25/3

15:35-10:55

1 stop12h 20m

London Gatwick

Tue 31/3

15:40-20:45

1 stop13h 05m

£405

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 31/3

15:45-14:40

1 stop14h 55m

London Gatwick

Wed 29/4

15:40-20:45

1 stop13h 05m

£456

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 1/4

15:45-14:40

1 stop14h 55m

London Gatwick

Wed 29/4

15:40-20:45

1 stop13h 05m

£467

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 1/4

15:45-14:40

1 stop14h 55m

London Gatwick

Fri 1/5

15:40-20:45

1 stop13h 05m

£472

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 31/1

19:00-22:35

1 stop19h 35m

London Gatwick

Sat 7/2

17:05-17:05

1 stop32h 00m

£572

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 7/12

07:55-10:55

2 stops19h 00m

London Gatwick

Sun 14/12

11:55-17:00

1 stop13h 05m

£582

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 12/11

08:37-10:55

2 stops18h 18m

London Gatwick

Thu 20/11

11:55-17:00

1 stop13h 05m

£586

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 1/12

14:35-10:55

1 stop12h 20m

London Gatwick

Thu 11/12

11:55-22:30

2 stops18h 35m

£590

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 3/12

14:35-10:55

1 stop12h 20m

London Gatwick

Thu 11/12

11:55-22:30

2 stops18h 35m

£590

Flights are sorted by cheapest return flights first.

Deals found on 25/10

Showing 1-10 of 23 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, April is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of £364). Flying from Seattle to London Gatwick Airport in June is currently the most expensive (average of £602). 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.

How much does it cost for a return flight from Seattle to London Gatwick Airport?

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 £388, Icelandair can have you in London Gatwick Airport from Seattle in 12h 20m. The distance from Seattle to London Gatwick Airport is about 4807 mi.

  • 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, April is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of £364). Flying from Seattle to London Gatwick Airport in June is currently the most expensive (average of £602). 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
Slough
Gatwick
Hounslow
Luton
Wembley
Ilford
Deal
Hayes
Colchester
Watford
Crawley
Winchester
Chichester
Romford
Ipswich
Bedford
Brentford
Dartford

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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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