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Cheap flights from Seattle to London Gatwick Airport from C$ 425

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 21/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LGW
30 Mar — 6 Apr1
1 adult

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 March 2025.

Round-trip from

C$ 852

One-way from

C$ 425

Popular in

June

Cheapest in

January

Average price

C$ 986
Icelandair
  • Icelandair
  • 5/5-20/5
  • 2 total stops
  • 25h 00m total
  • Seattle to London
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Icelandair
  • Icelandair
  • 21/9
  • 1 total stop
  • 11h 40m total
  • Seattle to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (C$ 406 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (C$ 87 potential savings vs. average RT price).
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Average for round-trip flights in March 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 25 March 2025.

Mon 3/112:35 p.m.SEA - LGW
1 stop12h 20mIcelandair
Sun 16/1111:55 a.m.LGW - SEA
1 stop13h 05mIcelandair
Deal found 24/3C$ 852
Tue 29/47:57 a.m.SEA - LGW
1 stop14h 23mMultiple Airlines
Sun 4/510:55 a.m.LGW - SEA
1 stop34h 30mMultiple Airlines
Deal found 24/3C$ 900
Wed 23/412:45 p.m.SEA - LGW
2 stops21h 10mSWISS
Wed 7/56:35 p.m.LGW - SEA
2 stops31h 58mSWISS
Deal found 24/3C$ 915
Mon 26/57:16 a.m.SEA - LGW
1 stop18h 44mVirgin Atlantic
Thu 12/612:00 p.m.LGW - SEA
1 stop18h 49mVirgin Atlantic
Deal found 24/3C$ 1,027
Mon 26/57:16 a.m.SEA - LGW
1 stop18h 44mDelta
Wed 11/612:00 p.m.LGW - SEA
1 stop18h 49mDelta
Deal found 24/3C$ 1,050
Thu 6/117:00 p.m.SEA - LGW
1 stop20h 00mTurkish Airlines
Thu 13/116:00 a.m.LGW - SEA
1 stop19h 05mTurkish Airlines
Deal found 24/3C$ 1,106
Mon 26/56:00 a.m.SEA - LGW
2 stops44h 00mAir France
Tue 10/612:00 p.m.LGW - SEA
1 stop18h 49mAir France
Deal found 24/3C$ 1,146
Wed 28/511:38 a.m.SEA - LGW
1 stop13h 57mJetBlue
Sun 15/612:10 p.m.LGW - SEA
1 stop18h 00mJetBlue
Deal found 25/3C$ 1,324
Sun 1/62:05 p.m.SEA - LGW
2 stops35h 20mWestJet
Sun 15/610:45 a.m.LGW - SEA
2 stops41h 43mWestJet
Deal found 24/3C$ 1,463

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 25 March 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 5/5

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

1 stop12h 00m

London Gatwick

Tue 20/5

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

1 stop13h 00m

C$ 852

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Tue 29/4

7:57 a.m.-6:20 a.m.

1 stop14h 23m

London Gatwick

Sun 4/5

10:55 a.m.-1:25 p.m.

1 stop34h 30m

C$ 900

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 23/4

12:45 p.m.-5:55 p.m.

2 stops21h 10m

London Gatwick

Wed 7/5

6:35 p.m.-6:33 p.m.

2 stops31h 58m

C$ 915

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 26/5

7:16 a.m.-10:00 a.m.

1 stop18h 44m

London Gatwick

Thu 12/6

12:00 p.m.-10:49 p.m.

1 stop18h 49m

C$ 1,027

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 26/5

7:16 a.m.-10:00 a.m.

1 stop18h 44m

London Gatwick

Wed 11/6

12:00 p.m.-10:49 p.m.

1 stop18h 49m

C$ 1,050

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 26/5

6:00 a.m.-10:00 a.m.

2 stops44h 00m

London Gatwick

Tue 10/6

12:00 p.m.-10:49 p.m.

1 stop18h 49m

C$ 1,146

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Wed 28/5

11:38 a.m.-9:35 a.m.

1 stop13h 57m

London Gatwick

Wed 18/6

12:10 p.m.-10:10 p.m.

1 stop18h 00m

C$ 1,324

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 1/6

2:05 p.m.-9:25 a.m.

2 stops35h 20m

London Gatwick

Sun 15/6

10:45 a.m.-8:28 p.m.

2 stops41h 43m

C$ 1,463

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Sun 21/9

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

1 stop11h 40m

C$ 425

SeattleLondon

SEA - LGW

SEALGW

Seattle/Tacoma Intl

Mon 19/5

10:12 a.m.-10:55 a.m.

1 stop16h 43m

C$ 523

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/3

Showing 1-10 of 19 results
1
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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

How far ahead should I book a flight from Seattle to London Gatwick Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Gatwick. Price data was last updated on 21 March 2025.

The best time to book flights from Seattle to London Gatwick Airport is 27 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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.

Rainfall in Gatwick by month

Plan your trip to Gatwick by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Gatwick Airport ranges from 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Gatwick Airport when rainfall is around 40.0 mm.

Temperature in Gatwick by month

Plan your trip to Gatwick by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Gatwick Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Gatwick

Get insights into the airlines that provide service to Gatwick. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Gatwick. Reviews last updated 25 March 2025.
Read reviews from past customers who have flown Delta, KLM and SWISS from Seattle to London. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,890 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,569 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,423 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
634 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines flying from Seattle to London Gatwick Airport round-trip?

    Currently priced at C$ 852, Icelandair will fly you from Seattle to London Gatwick Airport and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from SWISS and Virgin Atlantic - these airlines can fly you to your destination from C$ 915 and C$ 1,027, respectively. These flights start at 19% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Seattle to London Gatwick Airport one-way?

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at C$ 425. SWISS flights start at C$ 626 while deals on WestJet start at C$ 649 one-way.

  • 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

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Alternative routes for Seattle to Gatwick

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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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