Cheap Flights from Seattle, WA to London from $217

Return flight: London – Seattle

On Cheapflightsplus.com you will find 7 direct and 184 connecting flights from Seattle to London. You can compare airfare deals from 17 airlines and multiple travel sites from $217, book and save on cheap plane tickets and last minute offers. Also check out SEA-LON flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Seattle to London Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $217 (one-way), $372 (round-trip).
Direct flights
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Full flight schedule will help you in detecting at what time planes fly from Seattle to London. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
Departure Arrival Flight Details Flight Duration Price
13:45 — 07:10
+1 day
13:45 — 07:10 BA52 British Airways
Seattle — London
9h 25m
Find flight
from$456
13:45 — 07:10
+1 day
13:45 — 07:10 AS5272 Alaska Airlines
Seattle — London
9h 25m
Find flight
from$608
13:45 — 07:10
+1 day
13:45 — 07:10 AY5450 Finnair
Seattle — London
9h 25m
Find flight
from$623
18:50 — 12:15
+1 day
18:50 — 12:15 BA48 British Airways
Seattle — London
9h 25m
Find flight
from$456
18:50 — 12:15
+1 day
18:50 — 12:15 IB3506 Iberia
Seattle — London
9h 25m
Find flight
from$497
18:50 — 12:15
+1 day
18:50 — 12:15 AS5270 Alaska Airlines
Seattle — London
9h 25m
Find flight
from$606
18:50 — 12:15
+1 day
18:50 — 12:15 AY5448 Finnair
Seattle — London
9h 25m
Find flight
from$623
06:15 — 06:00
+1 day
06:05 — 14:29 AS280 Alaska Airlines
Seattle — New York
3h 42m stop
18:15 — 06:00 Z0702 Z0
New York — London
15h 45m
including layover
Find flight
from$364
13:42 — 11:30
+1 day
13:35 — 19:39 BA5593 British Airways
Seattle — Chicago
2h 5m stop
21:45 — 11:30 BA296 British Airways
Chicago — London
13h 48m
including layover
Find flight
from$461
14:35 — 10:50
+1 day
14:30 — 06:10 FI680 Icelandair
Seattle — Reykjavik
1h 20m stop
07:40 — 10:50 FI450 Icelandair
Reykjavik — London
12h 15m
including layover
Find flight
from$270
15:15 — 12:50
+1 day
15:15 — 17:55 WS1553 WestJet
Seattle — Calgary
3h 15m stop
21:10 — 12:50 WS18 WestJet
Calgary — London
13h 35m
including layover
Find flight
from$393
15:45 — 07:55
+2 days
15:40 — 23:59 AS460 Alaska Airlines
Seattle — Boston
20h 11m stop
20:10 — 07:55 VS158 Virgin Atlantic Airways
Boston — London
32h 10m
including layover
Find flight
from$455
05:45 — 07:10
+1 day
05:45 — 06:56 AC8801 Air Canada
Seattle — Vancouver
2h 28m stop
09:20 — 16:59 AC304 Air Canada
Vancouver — Montreal
2h 12m stop
19:15 — 07:10 AC866 Air Canada
Montreal — London
17h 25m
including layover
Find flight
from$476
05:45 — 09:20
+1 day
05:45 — 06:56 AC8801 Air Canada
Seattle — Vancouver
1h 18m stop
08:10 — 10:40 AC202 Air Canada
Vancouver — Calgary
6h 50m stop
17:30 — 09:20 AC850 Air Canada
Calgary — London
19h 35m
including layover
Find flight
from$476
06:15 — 07:20
+2 days
06:15 — 14:33 AS280 Alaska Airlines
Seattle — Newark
8h 27m stop
23:00 — 12:00 BF721 Bluebird Cargo
Newark — Paris
19h stop
07:00 — 07:20 U24639 EasyJet
Paris — London
41h 5m
including layover
Find flight
from$419
07:25 — 12:40
+1 day
07:12 — 15:32 TP8561 TAP Portugal
Seattle — Newark
1h 55m stop
17:45 — 05:55 TP202 TAP Portugal
Newark — Lisbon
4h 25m stop
09:45 — 12:40 TP1352 TAP Portugal
Lisbon — London
21h 15m
including layover
Find flight
from$217
07:25 — 22:40
+1 day
07:12 — 15:32 TP8561 TAP Portugal
Seattle — Newark
1h 55m stop
19:55 — 07:45 TP202 TAP Portugal
Newark — Lisbon
14h 25m stop
20:20 — 22:55 TP1366 TAP Portugal
Lisbon — London
31h 15m
including layover
Find flight
from$217
08:07 — 12:50
+1 day
08:07 — 11:00 AS2106 Alaska Airlines
Seattle — Edmonton
6h 59m stop
18:05 — 19:05 WS3352 WestJet
Edmonton — Calgary
2h 5m stop
21:10 — 12:50 WS18 WestJet
Calgary — London
20h 43m
including layover
Find flight
from$450
08:55 — 10:55
+1 day
07:55 — 14:03 AS408 Alaska Airlines
Seattle — Chicago
3h 20m stop
18:30 — 06:40 FI852 Icelandair
Chicago — Reykjavik
1h stop
07:40 — 10:55 FI470 Icelandair
Reykjavik — London
18h
including layover
Find flight
from$461
09:37 — 10:50
+1 day
09:19 — 13:04 F93406 Frontier Airlines
Seattle — Denver
2h 15m stop
15:40 — 06:05 FI670 Icelandair
Denver — Reykjavik
1h 30m stop
07:35 — 10:50 FI450 Icelandair
Reykjavik — London
17h 13m
including layover
Find flight
from$368
09:37 — 10:55
+1 day
09:19 — 13:04 F93406 Frontier Airlines
Seattle — Denver
2h 15m stop
15:40 — 06:05 FI670 Icelandair
Denver — Reykjavik
1h 35m stop
07:40 — 10:55 FI470 Icelandair
Reykjavik — London
17h 18m
including layover
Find flight
from$368
10:11 — 14:25
+1 day
10:10 — 18:29 AS398 Alaska Airlines
Seattle — Newark
4h 31m stop
23:00 — 12:00 BF721 Bluebird Cargo
Newark — Paris
2h 10m stop
14:10 — 14:25 VY8960 Vueling
Paris — London
20h 14m
including layover
Find flight
from$450
10:35 — 12:50
+1 day
10:35 — 11:42 AC8803 Air Canada
Seattle — Vancouver
6h 3m stop
17:45 — 20:16 WS122 WestJet
Vancouver — Calgary
54m stop
21:10 — 12:50 WS18 WestJet
Calgary — London
18h 15m
including layover
Find flight
from$464
11:30 — 12:50
+1 day
11:30 — 12:36 WS3731 WestJet
Seattle — Kelowna
1h 4m stop
13:40 — 15:53 WS3810 WestJet
Kelowna — Calgary
5h 17m stop
21:10 — 12:50 WS18 WestJet
Calgary — London
17h 20m
including layover
Find flight
from$348
11:30 — 12:50
+1 day
11:30 — 12:36 WS3731 WestJet
Seattle — Kelowna
2h 44m stop
15:20 — 17:28 WS460 WestJet
Kelowna — Calgary
3h 42m stop
21:10 — 12:50 WS18 WestJet
Calgary — London
17h 20m
including layover
Find flight
from$436
14:35 — 15:25
+1 day
14:35 — 06:15 FI680 Icelandair
Seattle — Reykjavik
1h 20m stop
07:35 — 09:55 FI430 Icelandair
Reykjavik — Glasgow
4h stop
14:45 — 16:15 U2866 EasyJet
Glasgow — London
16h 50m
including layover
Find flight
from$436
19:05 — 06:30
+2 days
19:05 — 20:12 AC8811 Air Canada
Seattle — Vancouver
3h 8m stop
23:20 — 06:52 AC126 Air Canada
Vancouver — Toronto
11h 18m stop
18:10 — 06:30 AC854 Air Canada
Toronto — London
27h 25m
including layover
Find flight
from$482
19:51 — 12:50
+3 days
19:51 — 22:34 F94830 Frontier Airlines
Seattle — Las Vegas
19h 56m stop
18:30 — 22:25 WS1585 WestJet
Las Vegas — Calgary
22h 45m stop
21:10 — 12:50 WS18 WestJet
Calgary — London
56h 59m
including layover
Find flight
from$326
22:08 — 10:55
+2 days
20:19 — 00:05 F91176 Frontier Airlines
Seattle — Denver
13h 49m stop
15:40 — 06:05 FI670 Icelandair
Denver — Reykjavik
1h 35m stop
07:40 — 10:55 FI470 Icelandair
Reykjavik — London
28h 47m
including layover
Find flight
from$368
22:08 — 10:50
+2 days
20:19 — 00:05 F91176 Frontier Airlines
Seattle — Denver
13h 49m stop
15:40 — 06:05 FI670 Icelandair
Denver — Reykjavik
1h 30m stop
07:35 — 10:50 FI450 Icelandair
Reykjavik — London
28h 42m
including layover
Find flight
from$369
23:59 — 10:55
+2 days
23:59 — 05:53 AS461 Alaska Airlines
Seattle — Chicago
12h 37m stop
18:30 — 06:40 FI852 Icelandair
Chicago — Reykjavik
1h stop
07:40 — 10:55 FI470 Icelandair
Reykjavik — London
26h 56m
including layover
Find flight
from$438
23:59 — 10:50
+2 days
23:59 — 05:53 AS461 Alaska Airlines
Seattle — Chicago
12h 37m stop
18:30 — 06:40 FI852 Icelandair
Chicago — Reykjavik
55m stop
07:35 — 10:50 FI450 Icelandair
Reykjavik — London
26h 51m
including layover
Find flight
from$439
*Departure and arrival times - local. Updated on February 8, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Seattle to London depends on and how to choose the most interesting flight option for you.

Distance between Seattle and London is 7714 miles. Time difference between the cities is 8h. Airplanes depart 05:02 to 23:59 from 3 Seattle airports and arrive 05:02 to 23:59 to 10 London airports. Average flight time is 9h 25m.

  • The fastest flight 9h 25m
  • Average flight time 9h 25m
  • The earliest flight 05:02
  • The latest flight 23:59
  • Distance 4794 ml

The cheapest months to travel to London are january (from 212 $), february (from 217 $), november (from 226 $).

The most expensive months are december (from 294 $), november (from 226 $), february (from 217 $).

What is the lowest airfare Seattle to London?

The cheapest plane ticket found by our users is $217. This airfare is for economy class on one-way TP8561 flight by TAP Portugal for February 10, 2025 which leaves Seattle-Tacoma Intl in Seattle at 07:25 am and arrives at London Heathrow at 22:40.

Economy class
$217
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Business class
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First class
?
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Popular Airlines on the Route

The flight Seattle — London is served by 17 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Air Canada - 24 departures per week at the price of from $ 464 . And the most expensive tickets are offered by All Nippon Airways airline - from $ 11098.

Direct flights

There are 7 nonstop flights on the route. The fastest direct flight is BA52 by British Airways takes 9h 25m and the cheapest is TP8561 by TAP Portugal for $456.

  • from $606
    Find
  • AY - Finnair
    from $623
    Find
  • IB - Iberia
    from $497
    Find
  • BA - British Airways
    from $456
    Find
See more direct flights

Connecting Flights

There are 184 flights with layovers on the route. The fastest connecting flight is BA6148 by British Airways takes 11h 35m and the cheapest is TP8561 by TAP Portugal for $217.

See more connecting flights

Airports

You can fly from Seattle to London from 3 airports (Boeing Field International Airport, Seattle-Tacoma Intl, Kenmore Air Harbor SPB).

Seattle airports

  • Boeing Field International Airport-BFI
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  • Seattle-Tacoma Intl-SEA
    from $217
    Find
  • Kenmore Air Harbor SPB-LKE
    Find

London airports

  • London City-LCY
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  • London-Waterloo-QQW
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  • Heathrow-LHR
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  • Luton-LTN
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  • British Rail Terminal-ZLX
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  • London Biggin Hill-BQH
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  • Stansted-STN
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  • Gatwick-LGW
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  • Ebbsfleet International Rail St-XQE
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  • Stratford International Rail St-XOF
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How to book a plane 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 flight ticket.
  • 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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