SEA - LGW

C$ 537 Find Cheap Flights from Seattle to London Gatwick Airport – Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
C$ 1,048
Typical prices: C$ 783-C$ 1,203
Icelandair
Fri 20/4Mon 30/4
SEA - LGW • 1 stop
Cheapest one-way flights
C$ 537
Typical prices: C$ 539-C$ 733
Delta
Tue 27/2
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
15 weeks
in advance
Our data shows that travellers who book at least 15 weeks in advance save around 50% compared to booking last minute.
Insights
Insights
When to travel
January
Cheapest • 22% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Reykjavik Keflavik Intl (KEF)
Cheapest • Avg C$ 1,031 (round-trip)
Frankfurt am Main (FRA)
Shortest trip • 14h 29m (one-way)
Insights
Insights
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
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

Tue, 20 Apr - Fri, 30 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 8:40 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
C$ 1,048Icelandair
1 day ago
Wed, 21 Apr - Fri, 30 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 8:40 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
C$ 1,048Icelandair
1 day ago
Tue, 20 Apr - Fri, 30 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 8:40 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
C$ 1,048Icelandair
1 day ago
Wed, 21 Apr - Fri, 30 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 8:40 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
13h 00m1 stop Reykjavik Keflavik Intl
C$ 1,048Icelandair
1 day ago
Tue, 16 Mar - Mon, 29 Mar
Icelandair Logo
3:35 p.m. - 10:55 a.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
12h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 5:55 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
34h 15m1 stop Reykjavik Keflavik Intl
C$ 1,050Icelandair
2 days ago
Wed, 21 Apr - Mon, 26 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 5:55 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
34h 15m1 stop Reykjavik Keflavik Intl
C$ 1,050Icelandair
1 day ago
Tue, 20 Apr - Thu, 29 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 5:55 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
34h 15m1 stop Reykjavik Keflavik Intl
C$ 1,050Icelandair
1 day ago
Wed, 21 Apr - Thu, 29 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 5:55 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
34h 15m1 stop Reykjavik Keflavik Intl
C$ 1,050Icelandair
1 day ago
Mon, 15 Mar - Mon, 29 Mar
Icelandair Logo
3:35 p.m. - 10:55 a.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
12h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 5:55 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
34h 15m1 stop Reykjavik Keflavik Intl
C$ 1,050Icelandair
2 days ago
Wed, 21 Apr - Mon, 26 Apr
Icelandair Logo
7:00 p.m. - 2:40 p.m.SEA  Seattle/Tacoma Intl-LGW London Gatwick
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 p.m. - 5:55 p.m.LGW  London Gatwick-SEA Seattle/Tacoma Intl
34h 15m1 stop Reykjavik Keflavik Intl
C$ 1,050Icelandair
1 day ago
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 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 typically range from C$ 783 to C$ 1,203. The lowest price found in the past 5 days was C$ 1,048, on Icelandair.

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

Based on deals KAYAK users found in the last 12 months, Friday is the cheapest day of the week to fly from Seattle to London Gatwick Airport. It's 9% cheaper than the average day, while Saturday is the most expensive, with prices 6% higher.

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

•January is the cheapest month to fly from Seattle to London Gatwick Airport at C$ 757 round-trip.
•July (C$ 1,295) and June (C$ 1,225) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 71% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

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

Flights from Seattle to London Gatwick Airport are cheapest 15 weeks before departure. Booking in this window typically costs about 50% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for Seattle to London Gatwick Airport flights

Low season

December

Cheapest flight

C$ 537
Beat the crowds with an average 51% drop in traveller numbers.
The most popular month to fly with an average 97% increase in traveller numbers.
One-way flight 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 answers about this route, including flight times, airports, airlines, and booking tips.

  • 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.

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

    A direct flight from Seattle to London Gatwick Airport takes 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 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$ 783 to C$ 1,203, with an average of C$ 966 over the past 12 months. Anything below C$ 783 counts as a good deal.

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

    Last-minute fares on this route (booked within two weeks of departure) run 54% above the C$ 966 route average. Book 15 weeks before departure for the lowest fares.

  • 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$ 562, which is 11% below the typical average for this route.

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

    London Gatwick Airport (LGW) hosts 5 major car rental companies, with daily rates averaging C$ 55 for economy cars. Top options include:

    • GREEN MOTION
    • DRIVALIA
    • U-Save
    • Europcar
    • Alamo

  • 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 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) – 83% of one-stop connections
    • Frankfurt am Main (FRA) – 15% of one-stop connections
    • Paris Charles de Gaulle (CDG) – 2% of one-stop connections
    • Istanbul (IST) – 0% of one-stop connections

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

    Yes. Flexible dates can save you up to 14% on flights from Seattle to London Gatwick Airport. Friday is the cheapest departure day at C$ 884 round-trip on average, while Saturday is the most expensive at C$ 1,025, a difference of C$ 141.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • 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 33m, compared with 14h 29m via Frankfurt am Main (FRA) and 15h 34m via Paris Charles de Gaulle (CDG).

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

    London Gatwick Airport is 7 hours ahead of Seattle (British Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • 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.

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 Friday departure and avoid flying on Saturday. On this route, Friday flights average C$ 884, about C$ 141 less than Saturday fares (14% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 15 weeks before you fly. On this route, that window historically saves about 50% 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 January. Fares historically average C$ 757 round-trip in that month – typically C$ 538 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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