SEA - LGW

C$ 458 Find Cheap Flights from Seattle to London Gatwick Airport – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
C$ 1,099
Typical prices: C$ 759-C$ 1,178
Icelandair
Sun 4/3Sat 17/3
SEA - LGW • 1 stop
Cheapest one-way flights
C$ 458
Typical prices: C$ 503-C$ 744
Delta
Sat 3/3
SEA - LGW • 1 stop
Direct flights
Not available
There are currently no direct flights between Seattle and London Gatwick Airport. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
26 weeks
in advance
Our data shows that travellers who book at least 26 weeks in advance save around 54% compared to booking last minute.
Insights
Insights
When to travel
March
Cheapest • 24% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Reykjavik Keflavik Intl (KEF)
Cheapest • Avg C$ 1,000 (round-trip)
Frankfurt am Main (FRA)
Shortest trip • 14h 46m (one-way)
Insights
Insights
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We hope you enjoy your trip to London Gatwick Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to London (SEA-LGW)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to London

Thu, 4 Mar - Sat, 20 Mar
Icelandair Logo
2:35 p.m. - 10:55 a.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
12h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:40 p.m. - 8:40 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
C$ 1,099Icelandair
Wed, 28 Oct - Sun, 8 Nov
Delta Logo
4:20 p.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
16h 25m1 stop Paris Charles de Gaulle
Delta Logo
10:00 a.m. - 3:14 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 14m1 stop Paris Charles de Gaulle
C$ 1,102Delta
Thu, 15 Oct - Fri, 23 Oct
Delta Logo
1:30 p.m. - 9:25 a.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 55m1 stop Paris Charles de Gaulle
Delta Logo
10:25 a.m. - 5:47 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
15h 22m1 stop Paris Charles de Gaulle
C$ 1,103Delta
Wed, 4 Nov - Sun, 15 Nov
Virgin Atlantic Logo
9:42 a.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
22h 03m2 stops Salt Lake City Paris Charles de Gaulle
Virgin Atlantic Logo
10:00 a.m. - 3:14 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 14m1 stop Paris Charles de Gaulle
C$ 1,109Virgin Atlantic
Wed, 13 Jan - Sun, 24 Jan
Delta Logo
3:25 p.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
16h 20m1 stop Paris Charles de Gaulle
Delta Logo
10:00 a.m. - 3:13 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 13m1 stop Paris Charles de Gaulle
C$ 1,114Delta
Wed, 27 Jan - Sun, 31 Jan
Delta Logo
3:25 p.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
16h 20m1 stop Paris Charles de Gaulle
Delta Logo
10:00 a.m. - 3:13 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 13m1 stop Paris Charles de Gaulle
C$ 1,116Delta
Fri, 16 Oct - Thu, 12 Nov
Virgin Atlantic Logo
1:30 p.m. - 9:25 a.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 55m1 stop Paris Charles de Gaulle
Virgin Atlantic Logo
10:00 a.m. - 11:57 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
21h 57m2 stops Paris Charles de Gaulle Atlanta Hartsfield-Jackson
C$ 1,117Virgin Atlantic
Fri, 16 Oct - Thu, 12 Nov
Virgin Atlantic Logo
1:30 p.m. - 9:25 a.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 55m1 stop Paris Charles de Gaulle
Virgin Atlantic Logo
4:45 p.m. - 3:14 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
30h 29m1 stop Paris Charles de Gaulle
C$ 1,120Virgin Atlantic
Mon, 25 Jan - Mon, 1 Feb
Virgin Atlantic Logo
12:00 p.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
19h 45m2 stops Los Angeles Paris Charles de Gaulle
Virgin Atlantic Logo
10:00 a.m. - 3:03 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 03m1 stop Paris Charles de Gaulle
C$ 1,121Virgin Atlantic
Wed, 28 Oct - Sat, 7 Nov
Virgin Atlantic Logo
7:24 a.m. - 9:00 a.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
18h 36m2 stops Boston Logan Intl Paris Charles de Gaulle
Virgin Atlantic Logo
10:00 a.m. - 10:05 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
20h 05m2 stops Paris Charles de Gaulle Boston Logan Intl
C$ 1,122Virgin Atlantic
Booking Insights

Price, demand, and travel trends for Seattle to London Gatwick Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Seattle to London Gatwick Airport with more confidence.

How much is a round-trip flight from Seattle to London Gatwick Airport?

Round-trip flights from Seattle to London Gatwick Airport start at C$ 1,099. Prices are typical for this route right now, with typical round-trip fares ranging from C$ 759 to C$ 1,178. The lowest price found in the past 5 days was C$ 1,099 on Icelandair.

What's the cheapest day of the week to fly from Seattle to London Gatwick Airport?

Saturday is the cheapest day of the week to fly from Seattle to London Gatwick Airport and is 12% cheaper than the average day. Wednesday is the most expensive day with flight prices 5% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Seattle to London Gatwick Airport?

  • March is the cheapest month to fly from Seattle to London Gatwick Airport at C$ 720 round-trip.
  • July (C$ 1,270) and June (C$ 1,217) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 76% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Seattle to London Gatwick Airport the cheapest?

Flights from Seattle to London Gatwick Airport are cheapest 26 weeks before departure. Booking in this window typically costs about 54% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Seattle to London Gatwick Airport flights

Low season

February

Cheapest flight

C$ 458
Best time to beat the crowds (17% less expensive on average)
Most popular time to fly (17% more expensive on average)
Flights from Seattle to London Gatwick Airport

When to book flights from Seattle to London

Are your dates flexible? Find out the best times to travel from Seattle to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Seattle to London Gatwick Airport flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airports can I use when flying from Seattle to London Gatwick Airport?

    Flights from Seattle to London Gatwick Airport usually depart from Seattle/Tacoma Intl (SEA) and arrive at London Gatwick (LGW).

  • Which cabin classes can I book on flights from Seattle to London Gatwick Airport?

    Only Economy Class is available on flights from Seattle to London Gatwick Airport.

  • Which airports do connecting flights from Seattle to London Gatwick Airport pass through?

    One-stop flights from Seattle to London Gatwick Airport most commonly connect through:

    • Reykjavik Keflavik Intl (KEF) – 90% of one-stop connections
    • Frankfurt am Main (FRA) – 9% of one-stop connections
    • Paris Charles de Gaulle (CDG) – 1% of one-stop connections
    • Istanbul (IST) – 0% of one-stop connections

    Reykjavik Keflavik Intl (KEF) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Seattle to London Gatwick Airport?

    On the Seattle to London Gatwick Airport route, being flexible with your departure day can save you up to 16%. Saturday is the cheapest day at C$ 842 round-trip on average, while Wednesday is the most expensive at C$ 1,002 – a C$ 160 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • Which popular places can I visit in London Gatwick Airport?

    Some of the most popular sights in London Gatwick Airport are Trafalgar Square, Hyde Park, and London Eye. These are among the most viewed places in London Gatwick Airport on KAYAK.

  • How expensive are last-minute Seattle to London Gatwick Airport flights?

    Last-minute fares on this route – booked within 2 weeks of departure – run 53% above the route average of C$ 949. Book 26 weeks before departure for the lowest fares.

  • How long does a flight from Seattle to London Gatwick Airport take?

    A direct flight from Seattle to London Gatwick Airport takes 0h 00m, covering 12,451 km.

  • Do I need a passport to fly from Seattle to London Gatwick Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How are flight prices from Seattle to London Gatwick Airport looking right now?

    One-way fares from Seattle to London Gatwick Airport are currently lower than usual. Average one-way flight prices are about C$ 499, which is 20% below the typical average for this route.

  • How much time can I save by choosing a different layover airport when travelling from Seattle to London Gatwick Airport?

    Flying via Reykjavik Keflavik Intl (KEF) gives the shortest average 1-stop total travel time at 13h 23m, compared with 14h 46m via Frankfurt am Main (FRA) and 16h 03m via Paris Charles de Gaulle (CDG).

  • What is the time difference between Seattle and London Gatwick Airport?

    London Gatwick Airport is 8 hours ahead of Seattle (British Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at London Gatwick Airport (LGW)?

    London Gatwick Airport (LGW) hosts 5 major car rental companies, with daily rates starting from around C$ 12 for economy cars. Top options include:
    • GREEN MOTION
    • DRIVALIA
    • U-Save
    • Europcar
    • Alamo

  • How much should I expect to pay for a Seattle to London Gatwick Airport flight?

    Round-trip flights from Seattle to London Gatwick Airport range from C$ 759 to C$ 1,178, with an average of C$ 949 over the past 12 months. Anything below C$ 759 counts as a good deal.

Your guide to booking Seattle to London Gatwick Airport flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Saturday departure instead of Wednesday. On this route, Saturday flights average C$ 842 – about C$ 160 less than Wednesday (16% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 26 weeks before you fly. On this route, that window historically saves about 54% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Seattle to London Gatwick Airport trip for March. Fares historically average C$ 720 round-trip in that month – typically C$ 550 less than the most expensive month, which is July (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to London Gatwick Airport.
    - Premier Inn London Gatwick Airport

More options for your flight from Seattle to London

Complete your trip to London with a hotel stay or car rental

Car rentals in London
Hotels in London
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