United Airlines Seattle to London Flights

Return flight: London – Seattle

Cheapflightsplus.com will find cheap United Airlines flights from Seattle to London. Compare airline ticket prices and book air tickets starting from $451 from trusted online travel agencies, web sites and directly from airlines. Check flights schedule of United Airlines, arrivals and departure details below.

Find Cheap Airfare Seattle (WA) — London by United Airlines

To find cheap tickets choose a day of your departure with attractive price on the graph below and click «Find flights». For round trip flights please click «Check prices for return flight». The cheapest airfare is in november: one-way - $451, two-way – $773.
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Below is a detailed 2024 flight schedule for today, tomorrow and all other days. It may vary depending on season and a day of the week of your desired trip. We recommend booking your itinerary at least 2 weeks prior your travel to get the best price and availability by the airline.
Departure Arrival Flight Details Flight Time Price
10:35 am — 10:10 am
+1 day
10:35 am — 11:46 am UA8242 United Airlines
Seattle — Vancouver
4h 58m stop
4:40 pm — 10:10 am UA8582 United Airlines
Vancouver — London
15h 35m
including layover
Find flight
from$451
10:55 am — 11:15 am
+1 day
10:55 am — 4:59 pm UA2296 United Airlines
Seattle — Chicago
4h 11m stop
9:10 pm — 11:15 am UA938 United Airlines
Chicago — London
16h 20m
including layover
Find flight
from$508
11:05 am — 11:15 am
+1 day
10:55 am — 4:59 pm UA747 United Airlines
Seattle — Chicago
4h stop
9:10 pm — 11:15 am UA938 United Airlines
Chicago — London
16h 10m
including layover
Find flight
from$456
11:20 pm — 8:35 pm
+1 day
10:36 pm — 6:43 am UA341 United Airlines
Seattle — Newark
59m stop
8:25 am — 8:35 pm UA934 United Airlines
Newark — London
13h 15m
including layover
Find flight
from$456
12:30 pm — 9:40 am
+1 day
12:30 pm — 4:14 pm UA431 United Airlines
Seattle — Denver
1h 21m stop
5:35 pm — 9:40 am UA27 United Airlines
Denver — London
13h 10m
including layover
Find flight
from$503
12:35 pm — 9:40 am
+1 day
12:35 pm — 4:17 pm UA1483 United Airlines
Seattle — Denver
1h 18m stop
5:35 pm — 9:40 am UA27 United Airlines
Denver — London
13h 5m
including layover
Find flight
from$456
2:00 pm — 12:00 pm
+1 day
2:00 pm — 4:17 pm UA375 United Airlines
Seattle — San Francisco
1h 8m stop
5:25 pm — 12:00 pm UA930 United Airlines
San Francisco — London
14h
including layover
Find flight
from$508
2:00 pm — 12:45 pm
+1 day
2:00 pm — 9:10 am UA8718 United Airlines
Seattle — Frankfurt
2h 50m stop
12:00 pm — 12:45 pm UA8815 United Airlines
Frankfurt — London
14h 45m
including layover
Find flight
from$524
3:10 pm — 6:35 pm
+1 day
3:10 pm — 10:15 am UA9413 United Airlines
Seattle — Munich
7h 15m stop
5:30 pm — 6:35 pm UA9450 United Airlines
Munich — London
19h 25m
including layover
Find flight
from$473
5:02 am — 9:40 am
+1 day
5:02 am — 8:44 am UA2269 United Airlines
Seattle — Denver
8h 51m stop
5:35 pm — 9:40 am UA27 United Airlines
Denver — London
20h 38m
including layover
Find flight
from$513
5:45 am — 10:10 am
+1 day
5:45 am — 6:52 am UA6614 United Airlines
Seattle — Vancouver
9h 48m stop
4:40 pm — 10:10 am UA8582 United Airlines
Vancouver — London
20h 25m
including layover
Find flight
from$513
8:05 am — 6:40 am
+1 day
8:05 am — 4:03 pm UA1360 United Airlines
Seattle — Washington D.C.
2h 22m stop
6:25 pm — 6:40 am UA918 United Airlines
Washington D.C. — London
14h 35m
including layover
Find flight
from$508
8:10 am — 6:40 am
+1 day
8:10 am — 4:09 pm UA1102 United Airlines
Seattle — Washington D.C.
2h 16m stop
6:25 pm — 6:40 am UA918 United Airlines
Washington D.C. — London
14h 30m
including layover
Find flight
from$513
9:00 am — 9:40 am
+1 day
8:30 am — 12:14 pm UA1829 United Airlines
Seattle — Denver
4h 52m stop
5:35 pm — 9:40 am UA27 United Airlines
Denver — London
16h 40m
including layover
Find flight
from$452
9:25 am — 7:25 am
+1 day
9:25 am — 11:39 am UA1960 United Airlines
Seattle — San Francisco
1h 11m stop
12:50 pm — 7:25 am UA901 United Airlines
San Francisco — London
14h
including layover
Find flight
from$503
3:25 pm — 8:35 pm
+1 day
3:25 pm — 5:44 pm UA589 United Airlines
Seattle — San Francisco
3h 41m stop
9:25 pm — 5:59 am UA1555 United Airlines
San Francisco — Newark
2h 26m stop
8:25 am — 8:35 pm UA934 United Airlines
Newark — London
21h 10m
including layover
Find flight
from$456
6:13 pm — 8:35 pm
+1 day
6:13 pm — 8:32 pm UA737 United Airlines
Seattle — San Francisco
2h 8m stop
10:40 pm — 7:05 am UA1318 United Airlines
San Francisco — Newark
1h 20m stop
8:25 am — 8:35 pm UA934 United Airlines
Newark — London
18h 22m
including layover
Find flight
from$456
6:13 pm — 8:35 pm
+1 day
6:13 pm — 8:32 pm UA737 United Airlines
Seattle — San Francisco
53m stop
9:25 pm — 5:59 am UA1555 United Airlines
San Francisco — Newark
2h 26m stop
8:25 am — 8:35 pm UA934 United Airlines
Newark — London
18h 22m
including layover
Find flight
from$456
7:00 am — 10:50 am
+1 day
7:00 am — 1:06 pm UA1373 United Airlines
Seattle — Chicago
56m stop
2:02 pm — 5:04 pm UA1373 United Airlines
Chicago — Houston
2h 46m stop
7:50 pm — 10:50 am UA5 United Airlines
Houston — London
19h 50m
including layover
Find flight
from$456
7:00 am — 12:50 pm
+1 day
7:00 am — 1:06 pm UA1373 United Airlines
Seattle — Chicago
5h 59m stop
7:05 pm — 10:45 am UA9727 United Airlines
Chicago — Zurich
1h 25m stop
12:10 pm — 12:50 pm UA9776 United Airlines
Zurich — London
21h 50m
including layover
Find flight
from$498
*Departure and arrival times are local. Last updated on 11/18/2024

Flight Information

There are 61 flight by United Airlines from Seattle to London every week with departures from Seattle-Tacoma Intl, Boeing Field International Airport, Kenmore Air Harbor SPB. All flights arrive at Gatwick, London City, Heathrow, Luton, Stansted, Stratford International Rail St, Ebbsfleet International Rail St, London Biggin Hill, London-Waterloo, British Rail Terminal.

Departures start from 10:35 am to 9:25 am. Nonstop flight is 12h 50m. The time difference between Seattle and London is 8h.

  • The fastest flight 12h 50m
  • Average flight time 16h 55m
  • The earliest flight 10:35 am
  • The latest flight 9:25 am
  • Distance 4794 ml

The cheapest months for traveling to London are january (from 451 $), february (from 456 $), november (from 500 $).

The most expensive and popular months are december (from 503 $), november (from 500 $), february (from 456 $).

The cheapest flight by United Airlines that our users were able to find is $451. This airfare is economy class on one-way UA8242 flight for January 22, 2025 leaving Seattle-Tacoma Intl in Seattle at 10:35 am, it includes all taxes and additional fees.

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Other Popular Airlines on the Route

Besides United Airlines there are other 22 airline carriers between Seattle and London. Please review schedules and prices from the most popular airlines to find the best airfare deals from Seattle to London.

Nonstop flights

There are 9 direct flights every day from Seattle. Airlines and fares are below:

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Connecting Flights

List of flights with layovers (1 and more stops):

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How to book an air ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected airfare.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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