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Cheap Flights from Seattle to London

  • Seattle London

    Mon, Sep 30

    From $457.00
  • Seattle London

    Sun, Sep 29

    From $515.00
  • Seattle London

    Sun, Sep 29

    From $534.00
  • Seattle London

    Sat, Sep 28

    From $533.00

Prices shown are for 1 adult ticket including taxes & fees.(As ticket fares can change frequently, these advertised prices are for reference only. The actual prices will be shown at time of booking.)

Seattle to London Flight Information

Below are some common questions asked about this flight route:

Best time to book Seattle to London flights

Generally the best time to book Seattle to London flights is two months in advance. And the cheapest days to fly are Tuesdays, Wednesdays, and Saturdays. Sunday is the most expensive.

How many direct flights from Seattle to London?

There are 19 direct flights from Seattle to London.

What is the most popular airline for non-stop flights from Seattle to London?

British Airways provides 63 of the non-stop flights between Seattle and London.

Airlines flying this route:
Airports in Seattle:
Airports in London:
Average duration of direct flights: 9h27m

Seattle to London Flight Schedule

Flight info. Departure
Arrival
Route Weekly Schedule
15:20 SEA 08:45 LHR
Seattle to London SMTWTFS Search
19:25 SEA 11:50 LHR
Seattle to London SMTWTFS Search
13:45 SEA 07:00 LGW
Seattle to London S-T-T-S Search
19:20 SEA 12:40 LHR
Seattle to London SMTWTFS Search
13:30 SEA 07:10 LHR
Seattle to London SMTWTFS Search
13:30 SEA 07:10 LHR
Seattle to London SMTWTFS Search
9W5827
17:55 SEA 11:15 LHR
Seattle to London SMTWTFS Search
AY5450
13:30 SEA 07:10 LHR
Seattle to London SMTWTFS Search
17:50 SEA 11:10 LHR
Seattle to London SMTWTFS Search
EI8748
19:20 SEA 12:40 LHR
Seattle to London SMTWTFS Search
IB4654
13:25 SEA 06:55 LHR
Seattle to London SM--TFS Search
AY5448
18:25 SEA 11:50 LHR
Seattle to London SMTWTFS Search
IB4602
19:20 SEA 12:40 LHR
Seattle to London SMTWTFS Search
EI8752
13:30 SEA 07:10 LHR
Seattle to London SMTWTFS Search
AF3563
17:15 SEA 11:10 LHR
Seattle to London -M----- Search
17:15 SEA 11:10 LHR
Seattle to London -M----- Search
17:15 SEA 11:10 LHR
Seattle to London -M----- Search
17:15 SEA 11:10 LHR
Seattle to London -M----- Search
IB7314
13:35 SEA 07:05 LHR
Seattle to London SMTWTFS Search
IB7312
19:20 SEA 12:40 LHR
Seattle to London SMTWTFS Search

Seattle to London Heathrow Airport (LHR)

17:50, Jan 9 - 12:25, Jan 16
VS | Virgin Atlantic
9h 20m
SEA - LHR
Nonstop
$398
Round-trip from
Search
13:35, Jan 16 - 09:40, Mar 30
AY | Finnair
9h 30m
SEA - LHR
Nonstop
$400
Round-trip from
Search
13:30, Mar 29 - 15:25, Apr 5
AA | American Airlines
9h 40m
SEA - LHR
Nonstop
$402
Round-trip from
Search
17:50, Jan 7 - 12:25, Jan 30
AF | Air France
9h 20m
SEA - LHR
Nonstop
$411
Round-trip from
Search
17:50, Jan 7 - 12:25, Jan 30
KL | Klm Royal Dutch Airlines
9h 20m
SEA - LHR
Nonstop
$411
Round-trip from
Search

Seattle to Gatwick Airport (LGW)

13:45, Oct 13 - 09:50, Oct 18
DI | Norwegian Air UK ltd
9h 15m
SEA - LGW
Nonstop
$416
Round-trip from
Search
13:45, Oct 21 - 09:50, Oct 25
DI | Norwegian Air UK ltd
9h 15m
SEA - LGW
Nonstop
$447
Round-trip from
Search
13:45, Oct 7 - 09:50, Oct 11
DI | Norwegian Air UK ltd
9h 15m
SEA - LGW
Nonstop
$456
Round-trip from
Search
13:45, Oct 16 - 09:50, Oct 18
DI | Norwegian Air UK ltd
9h 15m
SEA - LGW
Nonstop
$461
Round-trip from
Search
13:45, Oct 9 - 09:50, Oct 11
DI | Norwegian Air UK ltd
9h 15m
SEA - LGW
Nonstop
$470
Round-trip from
Search

Seattle to London City Airport (LCY)

13:23, Nov 15 - 12:25, Nov 19
KL | Klm Royal Dutch Airlines
12h 7m
SEA - LCY
1 stop
$538
Round-trip from
Search
13:50, Oct 13 - 06:30, Oct 23
LH | Lufthansa
18h 35m
SEA - LCY
2 stop
$473
Round-trip from
Search
19:25, Oct 9 - 21:35, Oct 15
EI | Aer Lingus
13h 35m
SEA - LCY
2 stop
$620
Round-trip from
Search
18:45, Feb 3 - 08:30, Feb 10
DE | Condor
14h 55m
SEA - LCY
2 stop
$918
Round-trip from
Search
20:00, Jan 16 - 13:10, Jan 21
EI | Aer Lingus
13h 0m
SEA - LCY
2 stop
$648
Round-trip from
Search

Prices shown are for 1 adult ticket including taxes & fees.(As ticket fares can change frequently, these advertised prices are for reference only. The actual prices will be shown at time of booking.)

Roundtrip vs One-Way Flights from Seattle to London

There is usually no major price difference between buying a roundtrip flight versus a one-way flight. Increased flexibility is the main benefit when it comes to buying a one-way flight from Seattle to London. However, booking a roundtrip flight is a simpler process. You can compare roundtrip and one-way flights by using our flight comparison tool.

Nonstop vs Connecting Flights from Seattle to London

The average price for connecting flights from Seattle to London is USD 646.70.The average price for nonstop flights from Seattle to London is USD 833.57.

Travel from Seattle to London

London attracts thousands of visitors every year for both business and pleasure. Planning a trip from Seattle to London is easy when you use Trip.com to help you make travel arrangements. With Trip.com, you can search for available flights and hotel rooms, and then make your booking quickly and easily online.

A Trip to Remember

Make your journey from Seattle to London a trip to remember when you use Trip.com to review city attractions before you arrive. With a preview of what's available at your destination, you can make any necessary reservations in advance for the best travel experience possible.

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