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Cheap flights from London Gatwick Airport to Seattle from £400

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 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
LGW — SEA
16 Jul — 23 Jul1
1 adult

Cheap flight deals from Gatwick to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Gatwick (LGW) to Seattle (SEA). 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 July 2025.

Round-trip from

£476

One-way from

£400

Popular in

August

Cheapest in

March

Average price

£666
SWISS
  • SWISS
  • 6/9-21/10
  • 4 total stops
  • 52h 46m total
  • London to Seattle
24/8
  • 24/8
  • 2 total stops
  • 35h 51m total
  • London to Seattle
Highest demand for flights based on searches. 15% potential increase in price (£74 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£17 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Gatwick to Seattle

Cheapest flights from Gatwick to Seattle
Explore the most affordable flight options available from Gatwick to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Sat 6/918:40LGW - SEA
2 stops31h 56mSWISS
Tue 21/1013:00SEA - LGW
2 stops20h 50mSWISS
Deal found 10/7£476
Mon 25/812:10LGW - SEA
1 stop17h 49mJetBlue
Tue 9/911:30SEA - LGW
1 stop14h 05mJetBlue
Deal found 9/7£478
Tue 5/815:40LGW - SEA
1 stop13h 00mIcelandair
Wed 3/915:45SEA - LGW
1 stop12h 00mIcelandair
Deal found 10/7£478
Mon 25/810:45LGW - SEA
1 stop32h 09mMultiple Airlines
Mon 1/907:00SEA - LGW
1 stop19h 50mMultiple Airlines
Deal found 11/7£500
Thu 4/1212:30LGW - SEA
2 stops32h 08mAmerican Airlines
Mon 8/1223:03SEA - LGW
2 stops49h 57mAmerican Airlines
Deal found 10/7£504

Cheapflights Fare Finder

Customise your flight search to find flights from Gatwick to Seattle 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 11 July 2025.
Use the filters below to find and compare flights from London Gatwick Airport to Seattle that are best for you.

Fly from

Gatwick

Fly to

Seattle

Route

Depart

Return

Price

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 6/9

18:40-18:36

2 stops31h 56m

Seattle/Tacoma Intl

Tue 21/10

13:00-17:50

2 stops20h 50m

£476

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 25/8

12:10-21:59

1 stop17h 49m

Seattle/Tacoma Intl

Tue 9/9

11:30-09:35

1 stop14h 05m

£478

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Tue 5/8

15:40-20:40

1 stop13h 00m

Seattle/Tacoma Intl

Wed 3/9

15:45-11:45

1 stop12h 00m

£478

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Mon 25/8

10:45-10:54

1 stop32h 09m

Seattle/Tacoma Intl

Mon 1/9

07:00-10:50

1 stop19h 50m

£500

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Thu 4/12

12:30-12:38

2 stops32h 08m

Seattle/Tacoma Intl

Mon 8/12

23:03-09:00

2 stops49h 57m

£504

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sun 24/8

10:55-14:46

2 stops35h 51m

£400

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Sat 16/8

10:45-20:28

2 stops41h 43m

£407

LondonSeattle

LGW - SEA

LGWSEA

London Gatwick

Wed 8/10

15:40-20:40

1 stop13h 00m

£435

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Best time to book a flight from Gatwick to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Gatwick 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 London Gatwick Airport to Seattle

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

Use this chart to determine the optimal time to book a return flight from Gatwick to Seattle. Price data was last updated on 27 June 2025.

The price you pay for your flight from London Gatwick Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 44 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from London Gatwick Airport to Seattle (average of £622). Flying from London Gatwick Airport to Seattle in July is currently the most expensive (average of £946). 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.

What is the cheapest time of day to fly from LGW to SEA?

Find hourly flight availability from Gatwick to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 July 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 8% on flights from London Gatwick Airport to Seattle by exploring options for tickets at midday.

How much does it cost for a return flight from London Gatwick Airport to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 11 July 2025.
Get a feel of what it's like to fly with SWISS, JetBlue, andAmerican Airlines from London Gatwick Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Overall

7.5

Food

7.0

Crew

8.2

Entertainment

6.8

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Kristina,Nov 2024

ZRH - BER

Never got on the flight due to my first plane being so delayed

Overall

7.5

Food

7.0

Crew

8.2

Entertainment

6.8

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Kristina,Nov 2024

ZRH - BER

Never got on the flight due to my first plane being so delayed

Overall

7.5

Food

7.0

Crew

8.2

Entertainment

6.8

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Kristina,Nov 2024

ZRH - BER

Never got on the flight due to my first plane being so delayed

Overall

7.5

Food

7.0

Crew

8.2

Entertainment

6.8

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Kristina,Nov 2024

ZRH - BER

Never got on the flight due to my first plane being so delayed

Overall

7.5

Food

7.0

Crew

8.2

Entertainment

6.8

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Kristina,Nov 2024

ZRH - BER

Never got on the flight due to my first plane being so delayed

Overall

7.5

Food

7.0

Crew

8.2

Entertainment

6.8

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
2.0
Mediocre

Kristina,Nov 2024

ZRH - BER

Never got on the flight due to my first plane being so delayed

Related info for your journey

Find useful and relevant information for your journey from Gatwick to Seattle. 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 into for flights to Seattle from London Gatwick?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from London Gatwick to Seattle. 2 airlines have flights to Seattle/Tacoma Intl from London Gatwick on a regular basis. Booking flights from London Gatwick to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 0 inbound flights from London Gatwick per day.

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

    Flying on SWISS is currently your cheapest option to Seattle, with prices starting at £476. Additional return tickets that might be worth considering are offered by JetBlue and Icelandair, with the lowest prices starting at £478 and £478, respectively. SWISS is priced at 10% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Gatwick to Seattle that include hotel bookings?

    Yes. In addition to deals on Gatwick to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Gatwick to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Gatwick to Seattle.

  • Can I find deals for business class flights from Gatwick to Seattle?

    Yes. Cheapflights offers flight deals from Gatwick to Seattle 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 London Gatwick Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from London Gatwick Airport to Seattle (average of £622). Flying from London Gatwick Airport to Seattle in July is currently the most expensive (average of £946). 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
Tacoma
Leavenworth
Bothell
SeaTac

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Gatwick to Seattle

Discover the top 2 airlines that operate flights from Gatwick to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£321Average£511FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£448Average£526FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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

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

Cheapflights simply makes it quick and affordable to book flights from Gatwick to Seattle 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 Gatwick to Seattle with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Gatwick to Seattle, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Gatwick to Seattle become cheaper?

Of course! You can now track prices for flights from Gatwick to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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