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Seattle-Tacoma International Airport to Heathrow Airport flight

Explore the cheapest one-way and round-trip flights from Seattle-Tacoma International Airport to Heathrow Airport over the next 90 days, with one-way fares from JPY 42,020 and round-trip from JPY 84,930. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        SEA 17:30
        9h 50m
        Direct
        LHR 11:20
        Seattle - London | Wed, Oct 7 | Virgin Atlantic
        LHR 17:45
        10h 29m
        Direct
        SEA 20:14
        London - Seattle | Tue, Oct 13 | Virgin Atlantic
        JPY 114,150 JPY 148,560
        23% off
        23% off
        JPY 148,560 JPY 114,150
      • SEA 21:40
        9h 25m
        Direct
        LHR 15:05
        Seattle - London | Sun, Oct 4 | Alaska Airlines
        LHR 17:00
        10h
        Direct
        SEA 19:00
        London - Seattle | Wed, Oct 7 | Alaska Airlines
        JPY 114,390 JPY 148,560
        23% off
        23% off
        JPY 148,560 JPY 114,390
      • SEA 15:55
        16h 5m
        1 stop
        LHR 16:00
        Seattle - London | Sun, Oct 4 | Scandinavian Airlines
        LHR 06:40
        15h 5m
        1 stop
        SEA 13:45
        London - Seattle | Tue, Oct 6 | Scandinavian Airlines
        JPY 84,930 JPY 148,560
        43% off
        43% off
        JPY 148,560 JPY 84,930
      • SEA 15:55
        21h 45m
        1 stop
        LHR 21:40
        Seattle - London | Sun, Sep 27 | Scandinavian Airlines
        LHR 19:30
        26h 15m
        1 stop
        SEA 13:45
        London - Seattle | Thu, Oct 1 | Scandinavian Airlines
        JPY 84,930
        43% off
        JPY 148,560 JPY 84,930
      • SEA 15:55
        18h 35m
        1 stop
        LHR 18:30
        Seattle - London | Sat, Sep 26 | Scandinavian Airlines
        LHR 19:30
        26h 15m
        1 stop
        SEA 13:45
        London - Seattle | Thu, Oct 1 | Scandinavian Airlines
        JPY 84,930
        43% off
        JPY 148,560 JPY 84,930
      • SEA 15:55
        17h 45m
        1 stop
        LHR 17:40
        Seattle - London | Tue, Oct 6 | Scandinavian Airlines
        LHR 06:40
        15h 5m
        1 stop
        SEA 13:45
        London - Seattle | Sat, Oct 10 | Scandinavian Airlines
        JPY 86,330
        42% off
        JPY 148,560 JPY 86,330
      • SEA 15:55
        16h 5m
        1 stop
        LHR 16:00
        Seattle - London | Sat, Oct 3 | Scandinavian Airlines
        LHR 06:40
        15h 5m
        1 stop
        SEA 13:45
        London - Seattle | Sat, Oct 10 | Scandinavian Airlines
        JPY 86,330
        42% off
        JPY 148,560 JPY 86,330
      • SEA 15:55
        13h 40m
        1 stop
        LHR 13:35
        Seattle - London | Fri, Oct 2 | Scandinavian Airlines
        LHR 19:30
        26h 15m
        1 stop
        SEA 13:45
        London - Seattle | Thu, Oct 8 | Scandinavian Airlines
        JPY 86,330
        42% off
        JPY 148,560 JPY 86,330
      • SEA 15:55
        16h 5m
        1 stop
        LHR 16:00
        Seattle - London | Tue, Sep 29 | Scandinavian Airlines
        LHR 06:40
        15h 5m
        1 stop
        SEA 13:45
        London - Seattle | Sat, Oct 3 | Scandinavian Airlines
        JPY 86,330
        42% off
        JPY 148,560 JPY 86,330
      • SEA 15:40
        12h 15m
        1 stop
        LHR 11:55
        Seattle - London | Fri, Oct 23 | Icelandair
        LHR 20:35
        28h 25m
        1 stop
        SEA 18:00
        London - Seattle | Wed, Oct 28 | Icelandair
        JPY 90,350
        39% off
        JPY 148,560 JPY 90,350
      • SEA 19:00
        32h 55m
        1 stop
        LHR 11:55
        Seattle - London | Thu, Oct 22 | Icelandair
        LHR 20:35
        28h 25m
        1 stop
        SEA 18:00
        London - Seattle | Wed, Oct 28 | Icelandair
        JPY 90,710
        39% off
        JPY 148,560 JPY 90,710
      • SEA 14:35
        20h 55m
        1 stop
        LHR 19:30
        Seattle - London | Mon, Nov 23 | Icelandair
        LHR 20:35
        28h 25m
        1 stop
        SEA 17:00
        London - Seattle | Mon, Nov 30 | Icelandair
        JPY 92,250
        38% off
        JPY 148,560 JPY 92,250
      • SEA 19:10
        11h 50m
        1 stop
        LHR 15:00
        Seattle - London | Mon, Sep 28 | Aer Lingus
        LHR 09:50
        15h 20m
        1 stop
        SEA 17:10
        London - Seattle | Wed, Sep 30 | Aer Lingus
        JPY 109,200
        26% off
        JPY 148,560 JPY 109,200
      • SEA 19:10
        11h 50m
        1 stop
        LHR 15:00
        Seattle - London | Sun, Oct 4 | Aer Lingus
        LHR 12:00
        13h 10m
        1 stop
        SEA 17:10
        London - Seattle | Wed, Oct 7 | Aer Lingus
        JPY 111,600
        25% off
        JPY 148,560 JPY 111,600
      • SEA 13:00
        17h 25m
        1 stop
        LON 14:00
        Seattle - London | Sun, Sep 27 | Normal Airline
        LON 15:00
        6h
        Direct
        SEA 16:00
        London - Seattle | Tue, Sep 29 | Normal Airline
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      • Cheapest nonstop
        SEA 16:50
        9h 50m
        Direct
        LHR 10:40
        Seattle - London | Sun, Nov 22 | Delta Air Lines
        JPY 52,630 JPY 68,540
        23% off
        23% off
        JPY 68,540 JPY 52,630
      • SEA 18:55
        9h 25m
        Direct
        LHR 12:20
        Seattle - London | Sun, Nov 22 | Alaska Airlines
        JPY 52,770 JPY 68,540
        23% off
        23% off
        JPY 68,540 JPY 52,770
      • SEA 15:40
        12h 10m
        1 stop
        LHR 10:50
        Seattle - London | Sat, Oct 24 | Icelandair
        JPY 42,020 JPY 68,540
        39% off
        39% off
        JPY 68,540 JPY 42,020
      • SEA 15:35
        12h 15m
        1 stop
        LHR 10:50
        Seattle - London | Mon, Oct 26 | Icelandair
        JPY 42,630
        38% off
        JPY 68,540 JPY 42,630
      • SEA 15:40
        12h 15m
        1 stop
        LHR 11:55
        Seattle - London | Mon, Sep 28 | Icelandair
        JPY 44,690
        35% off
        JPY 68,540 JPY 44,690
      • SEA 14:30
        14h 20m
        1 stop
        LHR 12:50
        Seattle - London | Sun, Nov 8 | WestJet
        JPY 46,020
        33% off
        JPY 68,540 JPY 46,020
      • SEA 19:00
        17h 20m
        1 stop
        LHR 20:20
        Seattle - London | Thu, Oct 8 | Icelandair
        JPY 46,070
        33% off
        JPY 68,540 JPY 46,070
      • SEA 15:40
        12h 15m
        1 stop
        LHR 11:55
        Seattle - London | Mon, Oct 12 | Icelandair
        JPY 46,070
        33% off
        JPY 68,540 JPY 46,070
      • SEA 14:35
        12h 15m
        1 stop
        LHR 10:50
        Seattle - London | Thu, Nov 5 | Icelandair
        JPY 46,300
        32% off
        JPY 68,540 JPY 46,300
      • SEA 14:35
        20h 55m
        1 stop
        LHR 19:30
        Seattle - London | Sat, Nov 7 | Icelandair
        JPY 46,330
        32% off
        JPY 68,540 JPY 46,330
      • SEA 14:35
        20h 55m
        1 stop
        LHR 19:30
        Seattle - London | Sat, Nov 14 | Icelandair
        JPY 47,300
        31% off
        JPY 68,540 JPY 47,300
      • SEA 15:40
        12h 15m
        1 stop
        LHR 11:55
        Seattle - London | Sat, Oct 3 | Icelandair
        JPY 47,320
        31% off
        JPY 68,540 JPY 47,320
      • SEA 19:00
        32h 55m
        1 stop
        LHR 11:55
        Seattle - London | Sun, Oct 4 | Icelandair
        JPY 47,680
        30% off
        JPY 68,540 JPY 47,680
      • SEA 19:05
        32h 45m
        1 stop
        LHR 11:50
        Seattle - London | Sat, Nov 7 | Air Canada
        JPY 47,770
        30% off
        JPY 68,540 JPY 47,770
      • SEA 13:00
        17h 25m
        1 stop
        LON 14:00
        Seattle - London | Sun, Sep 27 | Normal Airline
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Flight fares from Seattle-Tacoma International Airport to Heathrow Airport are based on average airline prices for the next 3 months, according to Trip.com’s latest data.

Trip.com Price Insights: Flights from Seattle-Tacoma International Airport to Heathrow Airport

What is the cheapest month to fly from Seattle-Tacoma International Airport to Heathrow Airport?

The data is based on the past 12 months and shows the average one-way ticket prices from Seattle-Tacoma International Airport to Heathrow Airport for each month in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest one-way flights from Seattle-Tacoma International Airport to Heathrow Airport are usually in August, with an average price of JPY 78,740. It is best to avoid June, when the average price can reach JPY 122,550.

JPY 122,550
JPY 100,645
JPY 78,740
JPY 56,835
    Cheapest
  • JPY 94,860
    Sep
  • JPY 82,250
    Oct
  • JPY 96,380
    Nov
  • JPY 95,750
    Dec
  • JPY 87,540
    Jan
  • JPY 80,610
    Feb
  • JPY 103,940
    Mar
  • JPY 112,820
    Apr
  • JPY 102,730
    May
  • JPY 122,550
    Jun
  • JPY 85,440
    Jul
  • JPY 78,740
    Aug

What is the cheapest day of the week to fly from Seattle-Tacoma International Airport to Heathrow Airport?

The data is based on the past 12 months and shows the average ticket prices from Seattle-Tacoma International Airport to Heathrow Airport for each day of the week in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest departure day from Seattle-Tacoma International Airport to Heathrow Airport is Monday, with average prices usually lower than other days. Avoid departing on Friday as prices are typically highest on that day.

JPY 98,840
JPY 84,190
JPY 69,540
JPY 54,890
  • JPY 69,540
    Mon
  • JPY 91,320
    Tue
  • JPY 93,660
    Wed
  • JPY 97,260
    Thu
  • JPY 98,840
    Fri
  • JPY 98,610
    Sat
  • JPY 92,920
    Sun

Which airline offers the cheapest flights from Seattle-Tacoma International Airport to Heathrow Airport?

The cheapest airline flying from Seattle-Tacoma International Airport to Heathrow Airport is Icelandair (from JPY 42,020) among 10 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Icelandair
From JPY 42,020
WestJet
From JPY 46,020
Air Canada
From JPY 46,160
United Airlines
From JPY 47,910
Alaska Airlines
From JPY 48,250
Virgin Atlantic
From JPY 49,450
Jetblue Airways
From JPY 49,970
Lufthansa
From JPY 50,970
Delta Air Lines
From JPY 51,060
American Airlines
From JPY 52,480

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What is the flight schedule from Seattle-Tacoma International Airport to Heathrow Airport?

Check the schedule for flights from Seattle to London and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. FI680

    Seattle-Tacoma International Airport

    15:40

    SEA

    7h 35m

    Direct

    06:15

    KEF

    S - T - T F S
    Search

  2. FI450

    Keflavík International Airport

    07:40

    KEF

    3h 15m

    Direct

    11:55

    LHR

    S M T W T F S

  3. WS1553

    Seattle-Tacoma International Airport

    10:30

    SEA

    1h 40m

    Direct

    13:10

    YYC

    S M T W T F S
    Search

  4. WS002

    Calgary International Airport

    20:35

    YYC

    8h 30m

    Direct

    12:05

    LHR

    S M T W T F S

  5. FI682

    Seattle-Tacoma International Airport

    19:00

    SEA

    7h 25m

    Direct

    09:25

    KEF

    S M T W T F S
    Search

  6. FI454

    Keflavík International Airport

    16:10

    KEF

    3h 10m

    Direct

    20:20

    LHR

    S M T W T F S

  7. FI682

    Seattle-Tacoma International Airport

    19:00

    SEA

    7h 25m

    Direct

    09:25

    KEF

    S M T W T F S
    Search

  8. FI208

    Keflavík International Airport

    11:00

    KEF

    3h 10m

    Direct

    16:10

    CPH

    S M T W T F S

  9. SK1501

    Copenhagen Airport

    20:40

    CPH

    2h

    Direct

    21:40

    LHR

    S M T W T - S

  10. FI680

    Seattle-Tacoma International Airport

    15:40

    SEA

    7h 35m

    Direct

    06:15

    KEF

    S - T - T F S
    Search

  11. FI454

    Keflavík International Airport

    16:10

    KEF

    3h 10m

    Direct

    20:20

    LHR

    S M T W T F S

  12. UA8250

    Seattle-Tacoma International Airport

    19:15

    SEA

    1h 7m

    Direct

    20:22

    YVR

    S M T W T F S
    Search

  13. UA8582

    Vancouver International Airport

    20:10

    YVR

    9h 10m

    Direct

    13:20

    LHR

    S M T W T F S

  14. FI682

    Seattle-Tacoma International Airport

    19:00

    SEA

    7h 25m

    Direct

    09:25

    KEF

    S M T W T F S
    Search

  15. FI450

    Keflavík International Airport

    07:40

    KEF

    3h 15m

    Direct

    11:55

    LHR

    S M T W T F S
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About Seattle-Tacoma International Airport and Heathrow Airport

Learn about Seattle-Tacoma International Airport (SEA) and Heathrow Airport (LHR) — including location, terminals, transportation, and travel tips.

Flight distance 7,711.31km
Cheapest one-way ticket price JPY 42,020
Cheapest return ticket price JPY 84,930

FAQs for Seattle-Tacoma International Airport to Heathrow Airport Flights

  • How long is the flight from Seattle-Tacoma International Airport to Heathrow Airport?

    Seattle-Tacoma International Airport to Heathrow Airport takes about 8 hours 48 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 8 daily flights from Seattle-Tacoma International Airport (SEA) to Heathrow Airport (LHR).
  • The earliest flight from Seattle-Tacoma International Airport to Heathrow Airport departs at 13:30, and the last departs at 21:50, with about 5 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Seattle-Tacoma International Airport (SEA) to Heathrow Airport (LHR) is quite popular. Without considering departure times or holidays, tickets cost around JPY 138,620 in December, the most expensive month to book this route.
    • The distance from London Gatwick Airport to downtown is about 39km, by taxi about 50 minutes.
    • The distance from Heathrow Airport to downtown is about 23km, by taxi about 40 minutes.
    • The distance from London Luton Airport to downtown is about 44km, by taxi about 1 hour.
  • British Airways is a very popular airline operating an average of 2873 flights per month.
  • One-way flights from Seattle-Tacoma International Airport to Heathrow Airport currently start from JPY 42,020, and round-trip fares start from JPY 84,930. The current lowest fare is a Icelandair flight departing on Sat, Oct 24; prices may vary depending on availability.
  • Yes. British Airways, Alaska Airlines, Delta Air Lines and Virgin Atlantic operate direct flights from Seattle-Tacoma International Airport to Heathrow Airport, with an average flight time of 8 hours 41 minutes, and around 35 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Seattle-Tacoma International Airport to Heathrow Airport is JPY 84,890. Prices may vary depending on the departure date, airline, and availability.
  • Seattle-Tacoma International Airport to Heathrow Airport operates around 34 weekly flights, mainly by British Airways, Alaska Airlines and Delta Air Lines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Seattle-Tacoma International Airport and Heathrow Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

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Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

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Prices displayed on this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, Wi-Fi, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within the last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.