United Airlines London to Seattle Flights

Return flight: Seattle – London

Cheapflightsplus.com will find cheap United Airlines flights from London to Seattle. Compare airline ticket prices and book air tickets starting from $432 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 London — Seattle (WA) 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 may: one-way - $432, two-way – $741.
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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
10:05 am — 8:01 pm
10:05 am — 1:05 pm UA15 United Airlines
London — Newark
3h 54m stop
4:59 pm — 8:01 pm UA1465 United Airlines
Newark — Seattle
17h 56m
including layover
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from$1550
10:05 am — 6:03 pm
10:05 am — 1:05 pm UA15 United Airlines
London — Newark
1h 55m stop
3:00 pm — 6:03 pm UA1932 United Airlines
Newark — Seattle
15h 58m
including layover
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from$1550
11:25 am — 7:39 pm
11:25 am — 2:15 pm UA26 United Airlines
London — Denver
3h 34m stop
5:49 pm — 7:39 pm UA1051 United Airlines
Denver — Seattle
16h 14m
including layover
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from$1550
11:35 am — 5:49 pm
11:35 am — 2:15 pm UA26 United Airlines
London — Denver
1h 40m stop
3:55 pm — 5:49 pm UA1823 United Airlines
Denver — Seattle
14h 14m
including layover
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from$437
12:00 pm — 8:01 pm
12:00 pm — 3:00 pm UA17 United Airlines
London — Newark
1h 59m stop
4:59 pm — 8:01 pm UA1465 United Airlines
Newark — Seattle
16h 1m
including layover
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from$1550
12:05 pm — 9:47 pm
12:05 pm — 2:45 pm UA8219 United Airlines
London — Toronto
4h 55m stop
7:40 pm — 9:47 pm UA8525 United Airlines
Toronto — Seattle
17h 42m
including layover
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from$1533
1:05 pm — 5:48 pm
1:05 pm — 2:35 pm UA8581 United Airlines
London — Vancouver
2h 15m stop
4:50 pm — 5:48 pm UA8251 United Airlines
Vancouver — Seattle
12h 43m
including layover
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from$432
1:40 pm — 10:18 am
+1 day
1:40 pm — 5:50 pm UA4 United Airlines
London — Houston
13h 45m stop
7:35 am — 10:18 am UA1579 United Airlines
Houston — Seattle
28h 38m
including layover
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from$1574
2:05 pm — 8:45 pm
2:05 pm — 4:50 pm UA8263 United Airlines
London — Toronto
1h 40m stop
6:30 pm — 8:45 pm UA8525 United Airlines
Toronto — Seattle
14h 40m
including layover
Find flight
from$444
2:30 pm — 6:13 pm
2:30 pm — 4:05 pm UA8581 United Airlines
London — Vancouver
1h 10m stop
5:15 pm — 6:13 pm UA8249 United Airlines
Vancouver — Seattle
11h 43m
including layover
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from$432
3:00 pm — 9:47 pm
3:00 pm — 5:40 pm UA8263 United Airlines
London — Toronto
2h stop
7:40 pm — 9:47 pm UA8525 United Airlines
Toronto — Seattle
14h 47m
including layover
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from$1533
4:00 pm — 10:39 am
+1 day
4:00 pm — 7:00 pm UA941 United Airlines
London — Newark
12h 40m stop
7:40 am — 10:39 am UA280 United Airlines
Newark — Seattle
26h 39m
including layover
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from$1550
6:00 pm — 10:39 am
+1 day
6:00 pm — 9:00 pm UA921 United Airlines
London — Newark
10h 40m stop
7:40 am — 10:39 am UA280 United Airlines
Newark — Seattle
24h 39m
including layover
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from$1550
6:30 am — 11:55 am
6:30 am — 9:05 am UA9546 United Airlines
London — Frankfurt
1h 40m stop
10:45 am — 11:55 am UA8717 United Airlines
Frankfurt — Seattle
13h 25m
including layover
Find flight
from$1522
7:30 am — 3:15 pm
7:30 am — 11:05 am UA123 United Airlines
London — Washington D.C.
1h 31m stop
12:36 pm — 3:15 pm UA1149 United Airlines
Washington D.C. — Seattle
15h 45m
including layover
Find flight
from$437
7:30 am — 8:17 pm
7:30 am — 10:55 am UA123 United Airlines
London — Washington D.C.
6h 38m stop
5:33 pm — 8:17 pm UA326 United Airlines
Washington D.C. — Seattle
20h 47m
including layover
Find flight
from$1550
8:30 am — 3:26 pm
8:30 am — 11:25 am UA929 United Airlines
London — Chicago
1h 35m stop
1:00 pm — 3:26 pm UA2091 United Airlines
Chicago — Seattle
14h 56m
including layover
Find flight
from$445
8:30 am — 9:47 pm
8:30 am — 11:10 am UA8203 United Airlines
London — Toronto
8h 30m stop
7:40 pm — 9:47 pm UA8525 United Airlines
Toronto — Seattle
21h 17m
including layover
Find flight
from$1533
9:30 am — 9:01 pm
9:30 am — 1:40 pm UA879 United Airlines
London — Houston
4h 40m stop
6:20 pm — 9:01 pm UA619 United Airlines
Houston — Seattle
19h 31m
including layover
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from$1550
9:30 am — 7:03 pm
9:30 am — 1:40 pm UA879 United Airlines
London — Houston
2h 42m stop
4:22 pm — 7:03 pm UA1792 United Airlines
Houston — Seattle
17h 33m
including layover
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from$1550
4:20 pm — 8:26 am
+1 day
4:20 pm — 8:45 pm UA925 United Airlines
London — Washington D.C.
1h 15m stop
10:00 pm — 1:01 am UA843 United Airlines
Washington D.C. — San Francisco
5h 29m stop
6:30 am — 8:26 am UA5689 United Airlines
San Francisco — Seattle
23h 6m
including layover
Find flight
from$510
*Departure and arrival times are local. Last updated on 04/28/2024

Flight Information

There are 71 flight by United Airlines from London to Seattle every week with departures from Gatwick, London City, Heathrow, Luton, Stansted, Stratford International Rail St, Ebbsfleet International Rail St, London Biggin Hill, London-Waterloo, British Rail Terminal. All flights arrive at Seattle-Tacoma Intl, Boeing Field International Airport, Kenmore Air Harbor SPB.

Departures start from 10:05 am to 9:30 am. Nonstop flight is 11h 43m. The time difference between London and Seattle is 8h.

  • The fastest flight 11h 43m
  • Average flight time 20h 21m
  • The earliest flight 10:05 am
  • The latest flight 9:30 am
  • Distance 4794 ml

The cheapest flight by United Airlines that our users were able to find is $432. This airfare is economy class on one-way UA8581 flight for November 21, 2020 leaving Heathrow in London at 2:30 pm, it includes all taxes and additional fees.

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Other Popular Airlines on the Route

Besides United Airlines there are other 27 airline carriers between London and Seattle. Please review schedules and prices from the most popular airlines to find the best airfare deals from London to Seattle.

Nonstop flights

There are 11 direct flights every day from London. 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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