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Seattle-Tacoma International Airport to London Heathrow Airport flight
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Cheap Flight Deals from Seattle-Tacoma International Airport to London Heathrow Airport

Search for flights from Seattle to London and check out affordable one-way and round-trip options.

  • One way
  • Round-trip
sortSort: Price (Lowest)
  • Sort: Price (Lowest)
  • Sort: Departure (Earliest)
      • SEA07:00
        21h 5m
        1 stop
        LHR12:05
        Seattle - London|Sun, May 19|WestJet
        CAD 274CAD 564
        51% OFF
        51% OFF
        CAD 564CAD 274
      • SEA07:00
        21h 5m
        1 stop
        LHR12:05
        Seattle - London|Sun, May 12|WestJet
        CAD 285CAD 564
        49% OFF
        49% OFF
        CAD 564CAD 285
      • SEA07:00
        21h 5m
        1 stop
        LHR12:05
        Seattle - London|Mon, May 20|WestJet
        CAD 312CAD 564
        45% OFF
        45% OFF
        CAD 564CAD 312
      • SEA15:30
        36h 30m
        2 stops
        LHR12:00
        Seattle - London|Fri, May 24|WestJet
        CAD 359
        CAD 359
      • SEA07:00
        21h
        1 stop
        LHR12:00
        Seattle - London|Sat, May 25|WestJet
        CAD 371
        CAD 371
      • SEA08:45
        19h 15m
        2 stops
        LHR12:00
        Seattle - London|Sat, May 4|Alaska Airlines
        CAD 378
        CAD 378
      • SEA09:15
        42h 50m
        2 stops
        LHR12:05
        Seattle - London|Sat, May 11|Alaska Airlines
        CAD 385
        CAD 385
      • SEA13:50
        14h 10m
        1 stop
        LHR12:00
        Seattle - London|Sat, May 11|WestJet
        CAD 415
        CAD 415
      • SEA16:25
        35h 35m
        2 stops
        LHR12:00
        Seattle - London|Thu, May 23|Alaska Airlines
        CAD 416
        CAD 416
      • SEA17:39
        20h 31m
        2 stops
        LHR22:10
        Seattle - London|Sat, May 18|Delta Air Lines
        CAD 427
        CAD 427
      • SEA13:00
        3h 5m
        Direct
        LHR14:00
        Seattle - London|Mon, May 6|WestJet
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Selected Airlines from Seattle-Tacoma International Airport to London Heathrow Airport

See which airlines fly from Seattle to London. Find the airline that best meets your travel needs by comparing prices and treat yourself to an enjoyable journey.

WestJet
From CAD 274
Alaska Airlines
From CAD 378
Delta Air Lines
From CAD 427
United Airlines
From CAD 438
Icelandair
From CAD 463
Frontier Airlines
From CAD 488
Spirit Airlines
From CAD 505
Jetblue Airways
From CAD 543
Sun Country Airlines
From CAD 550
Iberia
From CAD 604
ANA airlines
Find more flights and airlines
Flight Schedule from Seattle-Tacoma International Airport to London 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. UA1362

    United Airlines

    05:00

    SEA

    2.7h

    08:44

    DEN

    SMT--FS
    Search

  2. AA2357

    American Airlines

    10:38

    DEN

    2.0h

    13:39

    DFW

    SMTWTFS

  3. AA050

    American Airlines

    15:15

    DFW

    9.2h

    06:25

    LHR

    SMTWTFS

  4. DL1114

    Delta Air Lines

    07:50

    SEA

    5.5h

    16:21

    BOS

    SMTWTFS
    Search

  5. AA108

    American Airlines

    20:20

    BOS

    6.8h

    08:05

    LHR

    SMTWTFS

  6. AS620

    Alaska Airlines

    10:20

    SEA

    2.7h

    14:03

    DEN

    SMTWTFS
    Search

  7. AA2372

    American Airlines

    16:36

    DEN

    3.2h

    21:50

    CLT

    S-TWTFS

  8. AA734

    American Airlines

    23:10

    CLT

    8.0h

    12:10

    LHR

    SMTWTFS

  9. WS1553

    WestJet

    13:50

    SEA

    1.7h

    16:31

    YYC

    SMTWTFS
    Search

  10. WS018

    WestJet

    20:35

    YYC

    8.5h

    12:05

    LHR

    SMTWTFS

  11. UA2606

    United Airlines

    15:30

    SEA

    2.3h

    17:48

    SFO

    ----TFS
    Search

  12. AA4886

    American Airlines

    19:00

    SFO

    1.5h

    20:30

    LAX

    S--WTFS

  13. AA138

    American Airlines

    21:25

    LAX

    10.7h

    16:05

    LHR

    SMTWTFS

  14. UA1835

    United Airlines

    16:47

    SEA

    2.7h

    19:29

    LAX

    SMTWTFS
    Search

  15. AA138

    American Airlines

    21:25

    LAX

    10.7h

    16:05

    LHR

    SMTWTFS

  16. UA747

    United Airlines

    17:37

    SEA

    4.0h

    23:35

    ORD

    SMTWTFS
    Search

  17. AA090

    American Airlines

    08:20

    ORD

    7.8h

    22:10

    LHR

    SMTWTFS

  18. AS328

    Alaska Airlines

    22:45

    SEA

    3.9h

    04:40

    ORD

    SMTWTFS
    Search

  19. AA090

    American Airlines

    08:20

    ORD

    7.8h

    22:10

    LHR

    SMTWTFS

  20. AA2368

    American Airlines

    22:54

    SEA

    4.1h

    05:00

    ORD

    --TWTFS
    Search

  21. AA090

    American Airlines

    08:20

    ORD

    7.8h

    22:10

    LHR

    SMTWTFS

  22. AA1181

    American Airlines

    23:59

    SEA

    4.2h

    06:11

    ORD

    S------
    Search

  23. AA090

    American Airlines

    08:20

    ORD

    7.8h

    22:10

    LHR

    SMTWTFS
Find more flights and airlines

Seattle-Tacoma International Airport to London Heathrow Airport Flights Info

Flight distance7,711.31km
Cheapest one-way ticket priceCAD 274
Cheapest return ticket priceCAD 790

FAQs for Seattle-Tacoma International Airport to London Heathrow Airport Flights

  • How long does it take to fly from Seattle-Tacoma International Airport (SEA) to London Heathrow Airport (LHR)?

    It takes around 9 hours 25 minutes to fly from Seattle-Tacoma International Airport (SEA) to Seattle-Tacoma International Airport(LHR).

  • How many daily flights are there from Seattle-Tacoma International Airport (SEA) to London Heathrow Airport (LHR)?

    There are around 10 daily flights from Seattle-Tacoma International Airport (SEA) to London Heathrow Airport (LHR).

  • When are flight tickets from Seattle-Tacoma International Airport (SEA) to London Heathrow Airport (LHR) the cheapest?

    Tickets cost around CAD 1,129 in July, making it the cheapest month to book. Seattle-Tacoma International Airport (SEA) to London Heathrow Airport (LHR) is a popular route, so don't forget to book your tickets in advance.

  • When are flight tickets from Seattle-Tacoma International Airport (SEA) to London Heathrow Airport (LHR) most expensive?

    The route from Seattle-Tacoma International Airport (SEA) to London Heathrow Airport (LHR) is quite popular. Without considering departure times or holidays, tickets cost around CAD 1,424 in June, the most expensive month to book this route.

  • What is the transportation method from the main airport to downtown in London?

    • The distance from London Gatwick Airport to downtown is about 39km, by taxi about 50 minutes.
    • The distance from London 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.

  • Which airline operates the most direct flights from Seattle-Tacoma International Airport (SEA) to London Heathrow Airport (LHR)?

    Virgin Atlantic is a very popular airline operating an average of 1726 flights per month.

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