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Cheap flights from Seattle to London Gatwick Airport from £345

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 20/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LGW
7 Jun — 14 Jun1
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 8 May 2026.

Wed 30/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Mon 5/1015:40
LGW
-
SEA
1 stop34h 15m
Icelandair
Deal found 4/5£585
Thu 4/619:00
SEA
-
LGW
2 stops17h 00m
Multiple Airlines
Tue 9/617:50
LGW
-
SEA
2 stops25h 55m
Multiple Airlines
Deal found 3/5£588
Wed 11/1114:35
SEA
-
LGW
1 stop12h 20m
Icelandair
Wed 18/1111:55
LGW
-
SEA
1 stop13h 05m
Icelandair
Deal found 3/5£589
Wed 6/517:40
SEA
-
LGW
1 stop17h 05m
Condor
Wed 13/510:20
LGW
-
SEA
1 stop13h 20m
Condor
Deal found 3/5£592
Thu 10/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Wed 30/915:40
LGW
-
SEA
1 stop34h 15m
Icelandair
Deal found 3/5£593
Sun 3/517:40
SEA
-
LGW
1 stop17h 10m
Condor
Sun 10/510:20
LGW
-
SEA
1 stop13h 20m
Condor
Deal found 3/5£597
Thu 1/1015:40
SEA
-
LGW
1 stop15h 00m
Icelandair
Sun 11/1015:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 4/5£599
Tue 8/923:25
SEA
-
LGW
1 stop28h 20m
Icelandair
Sat 19/915:40
LGW
-
SEA
1 stop34h 15m
Icelandair
Deal found 3/5£599
Sat 12/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Sat 26/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 3/5£600
Wed 9/915:40
SEA
-
LGW
1 stop12h 05m
Icelandair
Tue 15/915:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 3/5£601
Tue 5/518:05
SEA
-
LGW
1 stop16h 45m
Condor
Tue 12/510:20
LGW
-
SEA
1 stop13h 20m
Condor
Deal found 4/5£602
Wed 23/919:00
SEA
-
LGW
1 stop11h 40m
Icelandair
Sun 4/1015:40
LGW
-
SEA
1 stop13h 00m
Icelandair
Deal found 4/5£604

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 8 May 2026.

Round-trip from

£585

One-way from

£345

Popular in

July

Cheapest in

November

Average price

£580
Icelandair
  • Icelandair
  • 30/9-5/10
  • 2 total stops
  • 45h 55m total
  • Seattle to London
Search Deals
20/6
  • 20/6
  • 3 total stops
  • 45h 15m total
  • Seattle to London
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. 4% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 8 May 2026.
Use the filters below to find and compare flights from Seattle to London Gatwick Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 10/10

15:40-14:40

1 stop15h 00m

London Gatwick

Wed 14/10

15:40-17:55

1 stop34h 15m

£648

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 14/10

07:00-08:25

2 stops17h 25m

London Gatwick

Wed 21/10

09:25-18:32

2 stops17h 07m

£674

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 10/6

17:40-14:45

1 stop13h 05m

London Gatwick

Mon 22/6

10:20-16:10

1 stop13h 50m

£685

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 16/6

18:05-18:50

1 stop16h 45m

London Gatwick

Sun 21/6

19:35-16:10

1 stop28h 35m

£700

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 26/8

07:00-08:25

2 stops17h 25m

London Gatwick

Fri 18/9

09:25-22:42

2 stops21h 17m

£741
Fastest return journey

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 18/9

18:00-14:40

1 stop12h 40m

London Gatwick

Mon 19/10

10:20-16:10

1 stop13h 50m

£748

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 26/8

11:45-09:35

1 stop13h 50m

London Gatwick

Sat 5/9

12:20-22:49

1 stop18h 29m

£775

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 10/6

17:40-14:45

1 stop13h 05m

London Gatwick

Tue 16/6

10:20-20:37

2 stops18h 17m

£787

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 19/7

13:30-16:00

1 stop18h 30m

London Gatwick

Fri 24/7

10:25-23:58

2 stops21h 33m

£882

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 11/6

18:05-18:50

1 stop16h 45m

London Gatwick

Sat 18/7

19:40-15:40

1 stop28h 00m

£946

Flights are sorted by cheapest return flights first.

Deals found on 7/5

Showing 1-10 of 24 resultsSorted by cheapest first
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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, November is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of £382). Flying from Seattle to London Gatwick Airport in July is currently the most expensive (average of £712). 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 £685, Icelandair can have you in London Gatwick Airport from Seattle in 13h 05m. 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, November is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of £382). Flying from Seattle to London Gatwick Airport in July is currently the most expensive (average of £712). 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
Wembley
Croydon
Hounslow
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Ipswich
Southend-on-Sea
Guildford
Bishop's Stortford
Chelmsford

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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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