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Cheap flights from Seattle to London Gatwick Airport from C$ 506

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LGW
11 Jan — 18 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 12 December 2025.

Fri 12/121:05 p.m.SEA - LGW
2 stops20h 45mSWISS
Fri 26/126:40 p.m.LGW - SEA
2 stops36h 07mSWISS
Deal found 11/12C$ 2,491
Thu 11/1211:36 a.m.SEA - LGW
2 stops15h 19mMultiple Airlines
Wed 24/1211:55 a.m.LGW - SEA
1 stop13h 05mMultiple Airlines
Deal found 10/12C$ 2,586
Sat 27/1211:34 p.m.SEA - LGW
1 stop22h 26mMultiple Airlines
Mon 5/11:00 p.m.LGW - SEA
1 stop29h 14mMultiple Airlines
Deal found 11/12C$ 2,635
Tue 23/1211:34 p.m.SEA - LGW
1 stop22h 26mMultiple Airlines
Wed 31/121:00 p.m.LGW - SEA
1 stop17h 17mMultiple Airlines
Deal found 11/12C$ 2,911
Mon 22/121:59 p.m.SEA - LGW
1 stop32h 01mMultiple Airlines
Mon 5/11:00 p.m.LGW - SEA
1 stop29h 14mMultiple Airlines
Deal found 11/12C$ 2,991
Wed 17/123:25 p.m.SEA - LGW
1 stop34h 35mMultiple Airlines
Mon 5/12:00 p.m.LGW - SEA
1 stop28h 40mMultiple Airlines
Deal found 10/12C$ 3,009
Thu 18/123:55 p.m.SEA - LGW
1 stop34h 05mMultiple Airlines
Mon 5/12:00 p.m.LGW - SEA
1 stop31h 10mMultiple Airlines
Deal found 10/12C$ 3,012
Fri 12/123:25 p.m.SEA - LGW
2 stops18h 25mSWISS
Sat 27/126:40 p.m.LGW - SEA
2 stops34h 27mSWISS
Deal found 11/12C$ 3,137
Sun 14/123:25 p.m.SEA - LGW
1 stop34h 35mMultiple Airlines
Fri 19/122:00 p.m.LGW - SEA
1 stop28h 40mMultiple Airlines
Deal found 10/12C$ 3,144
Fri 26/122:35 p.m.SEA - LGW
1 stop12h 20mMultiple Airlines
Fri 23/111:55 a.m.LGW - SEA
2 stops16h 44mMultiple Airlines
Deal found 10/12C$ 3,216
Tue 16/127:20 a.m.SEA - LGW
2 stops25h 05mMultiple Airlines
Thu 1/110:00 a.m.LGW - SEA
2 stops32h 26mMultiple Airlines
Deal found 11/12C$ 3,376
Thu 25/1211:36 a.m.SEA - LGW
2 stops20h 49mMultiple Airlines
Fri 2/110:00 a.m.LGW - SEA
2 stops32h 26mMultiple Airlines
Deal found 11/12C$ 3,445

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 12 December 2025.

Round-trip from

C$ 869

One-way from

C$ 506

Popular in

June

Cheapest in

November

Average price

C$ 969
Icelandair
  • Icelandair
  • 13/5-19/5
  • 2 total stops
  • 27h 20m total
  • Seattle to London
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WestJet
  • WestJet
  • 26/5
  • 3 total stops
  • 18h 00m total
  • Seattle to London
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 182 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 12 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

Fri 15/5

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

1 stop11h 40m

London Gatwick

Tue 19/5

1:00 p.m.-5:55 p.m.

1 stop12h 55m

C$ 880

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 12/1

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

1 stop12h 20m

London Gatwick

Sun 18/1

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

1 stop13h 05m

C$ 898

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 13/1

7:00 a.m.-6:00 a.m.

1 stop15h 00m

London Gatwick

Fri 16/1

2:00 p.m.-10:33 a.m.

1 stop28h 33m

C$ 1,117

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 24/1

7:00 p.m.-10:35 p.m.

1 stop19h 35m

London Gatwick

Tue 27/1

10:15 a.m.-5:05 p.m.

1 stop38h 50m

C$ 1,124

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 25/4

5:40 p.m.-2:35 p.m.

1 stop12h 55m

London Gatwick

Mon 27/4

10:20 a.m.-3:40 p.m.

1 stop13h 20m

C$ 1,187

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sat 2/5

3:40 p.m.-11:45 a.m.

1 stop12h 05m

London Gatwick

Sat 9/5

1:00 p.m.-8:35 p.m.

2 stops15h 35m

C$ 1,194

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 1/3

12:32 p.m.-5:50 p.m.

2 stops21h 18m

London Gatwick

Sat 7/3

6:40 p.m.-9:45 p.m.

2 stops35h 05m

C$ 1,247

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Thu 14/5

7:05 a.m.-9:05 a.m.

2 stops42h 00m

London Gatwick

Sun 17/5

10:35 a.m.-8:28 p.m.

2 stops41h 53m

C$ 1,305

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 3/5

7:05 a.m.-9:15 a.m.

2 stops42h 10m

London Gatwick

Fri 15/5

11:00 a.m.-8:28 p.m.

2 stops41h 28m

C$ 1,305

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 25/5

7:05 a.m.-9:05 a.m.

2 stops42h 00m

London Gatwick

Thu 28/5

10:35 a.m.-8:28 p.m.

2 stops41h 53m

C$ 1,305

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

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 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, May is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of C$ 681). Flying from Seattle to London Gatwick Airport in June is currently the most expensive (average of C$ 1,106). 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?

    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 11h 40m. Fly via Icelandair, Turkish Airlines, or Condor to get the fastest option. Seattle and London Gatwick Airport are separated by a distance of 7736 km. Both multi-stop and direct flights can be found to your destination and back.

  • 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, May is the cheapest month in which you can book a flight from Seattle to London Gatwick Airport (average of C$ 681). Flying from Seattle to London Gatwick Airport in June is currently the most expensive (average of C$ 1,106). 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
Sutton
Twickenham
Slough
Marlow
Milton Keynes
Romford
Watford
Bedford
Luton
Gatwick
Hounslow

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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

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Seattle to Gatwick. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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 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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