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 $160 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 may: one-way - $160, two-way – $274.
Direct flights
  • Check to choose departure date Check to choose departure date
Check prices for return flight
Find flights
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
4:22 pm — 2:05 pm
+1 day
4:22 pm — 6:23 pm UA2050 United Airlines
Seattle — San Francisco
1h 7m stop
7:30 pm — 2:05 pm OS7858 Austrian Airlines
San Francisco — London
13h 43m
including layover
Find flight
from$801
5:55 pm — 6:30 am
+2 days
5:55 pm — 9:27 pm UA1287 United Airlines
Seattle — Denver
17h 8m stop
2:35 pm — 6:30 am DI7172 Norwegian UK
Denver — London
28h 35m
including layover
Find flight
from$316
9:15 am — 7:25 am
+1 day
9:15 am — 3:30 pm UA2496 United Airlines
Seattle — Houston
50m stop
4:20 pm — 7:25 am UA880 United Airlines
Houston — London
14h 10m
including layover
Find flight
from$806
0:56 am — 9:30 am
+1 day
0:56 am — 6:49 am UA1195 United Airlines
Seattle — Chicago
56m stop
7:45 am — 11:02 am UA992 United Airlines
Chicago — Boston
10h 38m stop
9:40 pm — 9:30 am PF44 Primera Air
Boston — London
24h 34m
including layover
Find flight
from$309
0:57 am — 5:55 am
+1 day
0:57 am — 6:49 am UA1195 United Airlines
Seattle — Chicago
1h 41m stop
8:30 am — 12:32 pm UA503 United Airlines
Chicago — Miami
4h 3m stop
4:35 pm — 5:55 am DI7046 Norwegian UK
Miami — London
20h 58m
including layover
Find flight
from$345
10:30 pm — 10:00 pm
+2 days
10:30 pm — 6:20 am UA1695 United Airlines
Seattle — Newark
17h 25m stop
11:45 pm — 11:40 am TP212 TAP Portugal
Newark — Porto
7h 35m stop
7:15 pm — 10:00 pm TP1370 TAP Portugal
Porto — London
39h 30m
including layover
Find flight
from$182
10:55 am — 3:30 pm
+1 day
10:55 am — 1:14 pm UA1909 United Airlines
Seattle — San Francisco
3h 26m stop
4:40 pm — 11:30 am TP236 TAP Portugal
San Francisco — Lisbon
1h 10m stop
12:40 pm — 3:30 pm TP1368 TAP Portugal
Lisbon — London
20h 35m
including layover
Find flight
from$240
11:05 pm — 12:40 pm
+2 days
11:05 pm — 5:01 am UA2497 United Airlines
Seattle — Chicago
11h 54m stop
4:55 pm — 5:40 am TP242 TAP Portugal
Chicago — Lisbon
4h 5m stop
9:45 am — 12:40 pm TP1352 TAP Portugal
Lisbon — London
30h 35m
including layover
Find flight
from$234
11:05 pm — 9:50 am
+2 days
11:05 pm — 5:01 am UA2497 United Airlines
Seattle — Chicago
10h 54m stop
3:55 pm — 5:40 am TP242 TAP Portugal
Chicago — Lisbon
1h 30m stop
7:10 am — 9:50 am TP1338 TAP Portugal
Lisbon — London
26h 45m
including layover
Find flight
from$234
12:08 pm — 10:00 pm
+1 day
12:08 pm — 8:51 pm UA1125 United Airlines
Seattle — Newark
2h 54m stop
11:45 pm — 11:40 am TP212 TAP Portugal
Newark — Porto
7h 35m stop
7:15 pm — 10:00 pm TP1370 TAP Portugal
Porto — London
25h 52m
including layover
Find flight
from$160
12:08 pm — 10:55 pm
+1 day
12:08 pm — 8:51 pm UA1125 United Airlines
Seattle — Newark
3h 4m stop
11:55 pm — 12:15 pm TP204 TAP Portugal
Newark — Lisbon
8h 5m stop
8:20 pm — 10:55 pm TP1366 TAP Portugal
Lisbon — London
26h 47m
including layover
Find flight
from$254
1:17 pm — 11:20 am
+2 days
1:17 pm — 4:57 pm UA2493 United Airlines
Seattle — Denver
2h 23m stop
7:20 pm — 9:59 pm UA5234 United Airlines
Denver — Calgary
21h 51m stop
7:50 pm — 11:20 am WS1 WestJet
Calgary — London
38h 3m
including layover
Find flight
from$272
1:55 pm — 7:20 pm
+1 day
1:55 pm — 8:01 pm UA670 United Airlines
Seattle — Chicago
3h 39m stop
11:40 pm — 11:00 am WW156 WOW Air
Chicago — Reykjavik
1h stop
12:00 pm — 3:40 pm WW854 WOW Air
Reykjavik — London
21h 25m
including layover
Find flight
from$348
2:00 pm — 12:45 pm
+2 days
2:00 pm — 9:53 pm UA260 United Airlines
Seattle — Washington D.C.
22h 2m stop
7:55 pm — 8:20 am TP232 TAP Portugal
Washington D.C. — Lisbon
1h 40m stop
10:00 am — 12:45 pm TP1352 TAP Portugal
Lisbon — London
38h 45m
including layover
Find flight
from$267
2:17 pm — 11:20 am
+2 days
2:17 pm — 5:49 pm UA773 United Airlines
Seattle — Denver
1h 16m stop
7:05 pm — 9:38 pm UA591 United Airlines
Denver — Calgary
22h 12m stop
7:50 pm — 11:20 am WS1 WestJet
Calgary — London
37h 3m
including layover
Find flight
from$256
4:22 pm — 2:35 pm
+2 days
4:22 pm — 6:23 pm UA2050 United Airlines
Seattle — San Francisco
2h 32m stop
8:55 pm — 4:30 pm IB2622 Iberia
San Francisco — Barcelona
20h 40m stop
1:10 pm — 2:35 pm FR5091 Ryanair
Barcelona — London
39h 13m
including layover
Find flight
from$439
5:20 am — 11:00 am
+1 day
5:20 am — 8:55 am UA2436 United Airlines
Seattle — Denver
2h 37m stop
11:32 am — 2:08 pm UA5388 United Airlines
Denver — Calgary
5h 22m stop
7:30 pm — 11:00 am WS1 WestJet
Calgary — London
21h 40m
including layover
Find flight
from$255
6:00 am — 3:30 pm
+1 day
6:00 am — 8:17 am UA2499 United Airlines
Seattle — San Francisco
8h 23m stop
4:40 pm — 11:30 am TP236 TAP Portugal
San Francisco — Lisbon
1h 10m stop
12:40 pm — 3:30 pm TP1368 TAP Portugal
Lisbon — London
25h 30m
including layover
Find flight
from$189
6:00 am — 9:05 am
+1 day
6:00 am — 8:17 am UA2499 United Airlines
Seattle — San Francisco
33m stop
8:50 am — 4:55 pm UA608 United Airlines
San Francisco — Toronto
4h 5m stop
9:00 pm — 9:05 am TS122 Air Transat
Toronto — London
19h 5m
including layover
Find flight
from$274
7:12 am — 9:50 am
+1 day
7:12 am — 3:32 pm UA1591 United Airlines
Seattle — Newark
4h 23m stop
7:55 pm — 6:45 am TP202 TAP Portugal
Newark — Lisbon
25m stop
7:10 am — 9:50 am TP1338 TAP Portugal
Lisbon — London
19h 38m
including layover
Find flight
from$203
7:33 pm — 5:30 pm
+2 days
7:33 pm — 9:42 pm UA1074 United Airlines
Seattle — San Francisco
18h 58m stop
4:40 pm — 11:30 am TP236 TAP Portugal
San Francisco — Lisbon
3h 10m stop
2:40 pm — 5:30 pm TP1356 TAP Portugal
Lisbon — London
37h 57m
including layover
Find flight
from$269
8:00 am — 12:45 pm
+1 day
8:00 am — 4:27 pm UA424 United Airlines
Seattle — Newark
3h 28m stop
7:55 pm — 7:45 am TP202 TAP Portugal
Newark — Lisbon
2h 15m stop
10:00 am — 12:45 pm TP1352 TAP Portugal
Lisbon — London
20h 45m
including layover
Find flight
from$185
8:20 am — 5:45 pm
+1 day
8:20 am — 4:57 pm UA424 United Airlines
Seattle — Newark
6h 58m stop
11:55 pm — 12:15 pm TP204 TAP Portugal
Newark — Lisbon
2h 45m stop
3:00 pm — 5:45 pm TP1350 TAP Portugal
Lisbon — London
25h 25m
including layover
Find flight
from$185
*Departure and arrival times are local. Last updated on 04/29/2024

Flight Information

There are 85 flights 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 0:56 am to 9:15 am. Nonstop flight is 12h 40m. The time difference between Seattle and London is 8h.

  • The fastest flight 12h 40m
  • Average flight time 20h 48m
  • The earliest flight 0:56 am
  • The latest flight 9:15 am
  • Distance 4794 ml

The cheapest flight by United Airlines that our users were able to find is $160. This airfare is economy class on one-way UA1125 flight for October 21, 2020 leaving Seattle-Tacoma Intl in Seattle at 12:08 pm, it includes all taxes and additional fees.

Find same flight?

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

See more direct flights

Connecting Flights

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

See more connecting flights

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.

Back