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Cheap flights from Seattle to London Gatwick Airport from £256

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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LGW
8 Jan — 15 Jan1
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 December 2025.

Tue 9/1210:05SEA - LGW
3 stops24h 00mMultiple Airlines
Sat 13/1220:15LGW - SEA
2 stops34h 01mMultiple Airlines
Deal found 7/12£639
Sun 7/1213:05SEA - LGW
2 stops20h 45mSWISS
Wed 24/1218:40LGW - SEA
2 stops34h 27mSWISS
Deal found 7/12£666
Mon 8/1208:10SEA - LGW
2 stops21h 10mMultiple Airlines
Sun 14/1220:55LGW - SEA
2 stops33h 21mMultiple Airlines
Deal found 7/12£675
Sun 7/1214:35SEA - LGW
1 stop12h 20mIcelandair
Wed 10/1211:55LGW - SEA
1 stop13h 05mIcelandair
Deal found 7/12£698
Mon 15/1220:14SEA - LGW
2 stops30h 41mIcelandair
Sun 11/111:55LGW - SEA
2 stops29h 16mIcelandair
Deal found 7/12£750
Sun 14/1220:05SEA - LGW
1 stop13h 20mMultiple Airlines
Sun 28/1208:25LGW - SEA
1 stop17h 55mMultiple Airlines
Deal found 7/12£788
Sun 7/1210:43SEA - LGW
2 stops24h 17mIberia
Mon 15/1211:45LGW - SEA
2 stops43h 40mIberia
Deal found 7/12£798
Tue 30/1219:00SEA - LGW
1 stop19h 35mTurkish Airlines
Wed 7/110:15LGW - SEA
1 stop38h 50mTurkish Airlines
Deal found 8/12£800
Mon 8/1214:35SEA - LGW
1 stop12h 20mMultiple Airlines
Wed 24/1205:55LGW - SEA
2 stops17h 45mMultiple Airlines
Deal found 7/12£806
Wed 24/1214:35SEA - LGW
2 stops20h 55mMultiple Airlines
Wed 21/111:40LGW - SEA
1 stop18h 36mMultiple Airlines
Deal found 8/12£822

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 December 2025.

Round-trip from

£437

One-way from

£256

Popular in

June

Cheapest in

November

Average price

£527
Icelandair
  • Icelandair
  • 12/5-4/6
  • 2 total stops
  • 24h 40m total
  • Seattle to London
Search Deals
15/1
  • 15/1
  • 2 total stops
  • 23h 25m total
  • Seattle to London
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£54 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 December 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 9 December 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

Mon 9/3

15:35-10:55

1 stop12h 20m

London Gatwick

Mon 16/3

11:55-18:00

1 stop13h 05m

£449

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 11/3

15:35-10:55

1 stop12h 20m

London Gatwick

Mon 16/3

11:55-18:00

1 stop13h 05m

£510

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Fri 9/1

12:35-17:50

2 stops21h 15m

London Gatwick

Sun 18/1

18:40-21:12

2 stops34h 32m

£513

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 21/1

11:00-10:55

2 stops15h 55m

London Gatwick

Wed 28/1

11:55-17:00

1 stop13h 05m

£582

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 22/1

14:35-10:55

1 stop12h 20m

London Gatwick

Thu 29/1

11:55-22:30

2 stops18h 35m

£608

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 24/1

19:00-16:10

1 stop37h 10m

London Gatwick

Tue 27/1

06:25-17:05

1 stop18h 40m

£619

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 11/3

08:00-17:50

2 stops26h 50m

London Gatwick

Mon 16/3

18:40-19:03

2 stops31h 23m

£701

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 20/5

07:05-09:05

2 stops42h 00m

London Gatwick

Tue 26/5

10:35-20:28

2 stops41h 53m

£710

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 25/2

09:46-10:55

2 stops17h 09m

London Gatwick

Wed 11/3

11:55-21:01

2 stops16h 06m

£736

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 5/1

23:34-06:00

1 stop22h 26m

London Gatwick

Mon 12/1

13:00-14:57

1 stop33h 57m

£759

Flights are sorted by cheapest return flights first.

Deals found on 8/12

Showing 1-10 of 22 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, May is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of £371). 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.

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 £449, 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. 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, May is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of £371). 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
Hounslow
Luton
Gatwick
Wembley
Ilford
Brentford
Colchester
Watford
Hayes
Crawley
Winchester
Deal
Bedford
Romford
Chichester
Guildford
Ipswich

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When you search for this flight from Seattle to Gatwick, 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 Seattle to Gatwick?

Cheapflights simply makes it quick and affordable to book flights from Seattle to Gatwick 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 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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