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Cheap flights from Seattle to London Gatwick Airport from C$ 367

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LGW
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Round-trip from

C$ 718

One-way from

C$ 367

Popular in

June

Cheapest in

January

Average price

C$ 1,017
Icelandair
  • Icelandair
  • 24/2-20/3
  • 2 total stops
  • 25h 25m total
  • Seattle to London
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21/1
  • 21/1
  • 1 total stop
  • 15h 05m total
  • Seattle to London
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Highest demand for flights based on searches. 10% potential increase in price (C$ 157 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 35 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 Seattle to Gatwick

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 11 September 2025.

Sun 12/107:00 p.m.SEA - LGW
1 stop11h 40mIcelandair
Thu 23/103:40 p.m.LGW - SEA
1 stop13h 00mIcelandair
Deal found 10/9C$ 718
Thu 13/112:35 p.m.SEA - LGW
1 stop12h 20mIcelandair
Sat 22/1111:55 a.m.LGW - SEA
1 stop13h 05mIcelandair
Deal found 11/9C$ 719
Thu 9/107:00 p.m.SEA - LGW
1 stop11h 40mIcelandair
Tue 14/103:40 p.m.LGW - SEA
1 stop34h 10mIcelandair
Deal found 11/9C$ 721
Sun 28/97:00 p.m.SEA - LGW
1 stop11h 40mIcelandair
Fri 31/1011:55 a.m.LGW - SEA
1 stop13h 05mIcelandair
Deal found 11/9C$ 728
Tue 23/97:00 p.m.SEA - LGW
1 stop11h 40mIcelandair
Sat 27/93:40 p.m.LGW - SEA
1 stop13h 00mIcelandair
Deal found 11/9C$ 737
Sun 23/112:35 p.m.SEA - LGW
1 stop12h 20mIcelandair
Thu 27/1111:55 a.m.LGW - SEA
1 stop13h 05mIcelandair
Deal found 10/9C$ 806
Tue 30/97:00 p.m.SEA - LGW
1 stop11h 40mIcelandair
Mon 27/102:40 p.m.LGW - SEA
1 stop34h 20mIcelandair
Deal found 11/9C$ 809
Sun 28/97:00 p.m.SEA - LGW
1 stop11h 40mIcelandair
Mon 27/102:40 p.m.LGW - SEA
1 stop34h 20mIcelandair
Deal found 11/9C$ 819
Tue 11/1111:07 a.m.SEA - LGW
1 stop34h 53mMultiple Airlines
Mon 17/111:00 p.m.LGW - SEA
1 stop29h 25mMultiple Airlines
Deal found 10/9C$ 822
Mon 27/1011:07 a.m.SEA - LGW
1 stop35h 53mMultiple Airlines
Wed 19/111:00 p.m.LGW - SEA
1 stop17h 11mMultiple Airlines
Deal found 11/9C$ 831
Thu 13/112:40 p.m.SEA - LGW
1 stop31h 20mMultiple Airlines
Mon 17/111:00 p.m.LGW - SEA
1 stop29h 25mMultiple Airlines
Deal found 10/9C$ 834
Sun 9/112:40 p.m.SEA - LGW
1 stop31h 20mMultiple Airlines
Wed 19/111:00 p.m.LGW - SEA
1 stop17h 11mMultiple Airlines
Deal found 11/9C$ 845

Cheapflights Fare Finder

 
Customize 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 629,999 searches. Data last updated 11 September 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

Tue 11/11

2:35 p.m.-10:55 a.m.

1 stop12h 20m

London Gatwick

Tue 18/11

11:55 a.m.-5:00 p.m.

1 stop13h 05m

C$ 718

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 15/10

7:00 p.m.-2:40 p.m.

1 stop11h 40m

London Gatwick

Thu 23/10

3:40 p.m.-8:40 p.m.

1 stop13h 00m

C$ 718

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 13/10

7:00 p.m.-2:35 p.m.

1 stop11h 35m

London Gatwick

Thu 23/10

3:40 p.m.-8:40 p.m.

1 stop13h 00m

C$ 718

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 13/11

2:35 p.m.-10:55 a.m.

1 stop12h 20m

London Gatwick

Mon 24/11

11:55 a.m.-5:00 p.m.

1 stop13h 05m

C$ 719

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 17/11

2:35 p.m.-10:55 a.m.

1 stop12h 20m

London Gatwick

Sat 22/11

11:55 a.m.-5:00 p.m.

1 stop13h 05m

C$ 719

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 15/11

2:35 p.m.-10:55 a.m.

1 stop12h 20m

London Gatwick

Wed 19/11

11:55 a.m.-5:00 p.m.

1 stop13h 05m

C$ 719

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 1/10

3:45 p.m.-2:40 p.m.

1 stop14h 55m

London Gatwick

Thu 30/10

11:55 a.m.-6:00 p.m.

1 stop13h 05m

C$ 719

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 12/11

2:35 p.m.-10:55 a.m.

1 stop12h 20m

London Gatwick

Mon 17/11

11:55 a.m.-5:00 p.m.

1 stop13h 05m

C$ 719

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 10/11

2:35 p.m.-10:55 a.m.

1 stop12h 20m

London Gatwick

Sun 16/11

11:55 a.m.-5:00 p.m.

1 stop13h 05m

C$ 719

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 10/11

2:35 p.m.-10:55 a.m.

1 stop12h 20m

London Gatwick

Wed 19/11

11:55 a.m.-5:00 p.m.

1 stop13h 05m

C$ 719

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

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 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 Seattle to London Gatwick Airport

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

Currently, January is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of C$ 511). Flying from Seattle to London Gatwick Airport in July is currently the most expensive (average of C$ 793). 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 to fly round-trip 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?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to London Gatwick. You should not have trouble finding flights to London Gatwick from Seattle/Tacoma Intl; the airport handles an average of 0 outbound flights to London Gatwick per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Seattle airport to London Gatwick. It is only a 18.4 km journey to Seattle/Tacoma Intl (SEA) from Seattle’s city centre.

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

    There are many flights that can get you from Seattle to London Gatwick Airport in 12h 20m. Fly via Icelandair to get the fastest option. Seattle and London Gatwick Airport are separated by a distance of 7736 km.

  • 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 vacation 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, January is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of C$ 511). Flying from Seattle to London Gatwick Airport in July is currently the most expensive (average of C$ 793). 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
Brentford
Sutton
Hounslow
Slough
Marlow
Milton Keynes
Romford
Watford
Bedford
Luton
Southall

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Alternative routes for Seattle to Gatwick

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Heathrow flights

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How does Cheapflights help users find flights from Seattle to Gatwick?

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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 offers price alerts on Seattle to Gatwick flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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