Cheap Flights from London to Seattle, WA from $381

Return flight: Seattle – London

On Cheapflightsplus.com you will find 7 direct and 136 connecting flights from London to Seattle. You can compare airfare deals from 25 airlines and multiple travel sites from $381, book and save on cheap plane tickets and last minute offers. Also check out LON-SEA flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip London to Seattle 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: $381 (one-way), $653 (round-trip).
Direct flights
  • Check to choose departure date Check to choose departure date
Check prices for return flight
Find flights
Full flight schedule will help you in detecting at what time planes fly from London to Seattle. 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
09:50 — 11:35
09:50 — 11:35 BA53 British Airways
London — Seattle
9h 45m
Find flight
from$528
09:50 — 11:35
09:50 — 11:35 IB3509 Iberia
London — Seattle
9h 45m
Find flight
from$553
09:50 — 11:35
09:50 — 11:35 AY5451 Finnair
London — Seattle
9h 45m
Find flight
from$1039
09:50 — 11:35
09:50 — 11:35 EI8753 Aer Lingus
London — Seattle
9h 45m
Find flight
from$1088
16:30 — 18:20
16:30 — 18:20 BA49 British Airways
London — Seattle
9h 50m
Find flight
from$508
16:30 — 18:20
16:30 — 18:20 IB3507 Iberia
London — Seattle
9h 50m
Find flight
from$1041
16:30 — 18:20
16:30 — 18:20 AY5449 Finnair
London — Seattle
9h 50m
Find flight
from$1049
07:40 — 17:50
07:50 — 09:10 EI151 Aer Lingus
London — Dublin
7h 10m stop
16:30 — 18:15 EI53 Aer Lingus
Dublin — Seattle
18h 10m
including layover
Find flight
from$559
08:50 — 17:50
08:50 — 10:15 EI153 Aer Lingus
London — Dublin
5h 55m stop
16:30 — 18:15 EI53 Aer Lingus
Dublin — Seattle
17h
including layover
Find flight
from$501
08:50 — 17:50
08:50 — 10:15 BA5953 British Airways
London — Dublin
5h 55m stop
16:30 — 18:15 BA6149 British Airways
Dublin — Seattle
17h
including layover
Find flight
from$583
09:50 — 17:50
09:50 — 11:15 EI155 Aer Lingus
London — Dublin
4h 55m stop
16:30 — 18:15 EI53 Aer Lingus
Dublin — Seattle
16h
including layover
Find flight
from$501
11:35 — 19:31
11:35 — 14:15 TS729 Air Transat
London — Montreal
2h 30m stop
16:45 — 19:37 AC515 Air Canada
Montreal — Seattle
15h 56m
including layover
Find flight
from$564
12:00 — 17:50
12:10 — 13:35 EI159 Aer Lingus
London — Dublin
2h 45m stop
16:30 — 18:15 EI53 Aer Lingus
Dublin — Seattle
13h 50m
including layover
Find flight
from$501
06:05 — 19:52
06:05 — 08:25 U22433 EasyJet
London — Paris
4h 30m stop
12:55 — 14:08 WS9 WestJet
Paris — Calgary
4h 52m stop
19:00 — 19:52 AS2226 Alaska Airlines
Calgary — Seattle
21h 47m
including layover
Find flight
from$540
06:40 — 20:40
06:40 — 10:05 SK1530 SAS
London — Hagersten
6h 35m stop
16:40 — 17:55 FI309 Icelandair
Hagersten — Reykjavik
1h 50m stop
19:45 — 20:40 FI683 Icelandair
Reykjavik — Seattle
22h
including layover
Find flight
from$540
07:10 — 20:40
06:55 — 10:20 BA776 British Airways
London — Hagersten
6h 5m stop
16:40 — 17:55 FI309 Icelandair
Hagersten — Reykjavik
1h 50m stop
19:45 — 20:40 FI683 Icelandair
Reykjavik — Seattle
21h 30m
including layover
Find flight
from$534
11:00 — 20:40
11:00 — 14:35 D84452 Djibouti Airlines
London — Hagersten
2h 5m stop
16:40 — 17:55 FI309 Icelandair
Hagersten — Reykjavik
1h 50m stop
19:45 — 20:40 FI683 Icelandair
Reykjavik — Seattle
17h 40m
including layover
Find flight
from$523
12:40 — 10:39
+1 day
12:40 — 15:40 TS123 Air Transat
London — Toronto
4h 25m stop
20:05 — 21:50 PD655 Porter Airlines
Toronto — Las Vegas
9h 55m stop
07:45 — 10:39 HA6135 Hawaiian Airlines
Las Vegas — Seattle
29h 59m
including layover
Find flight
from$536
13:05 — 08:54
+1 day
13:05 — 15:55 Z0701 Z0
London — Newark
4h 4m stop
19:59 — 22:58 AS287 Alaska Airlines
Newark — Los Angeles
7h 2m stop
06:00 — 08:54 AS1293 Alaska Airlines
Los Angeles — Seattle
27h 49m
including layover
Find flight
from$448
13:55 — 19:32
+1 day
13:55 — 19:45 W95747 Wizz Air UK
London — Athens
14h stop
09:45 — 13:15 N0511 N0
Athens — Los Angeles
3h 26m stop
16:41 — 19:32 F91177 Frontier Airlines
Los Angeles — Seattle
37h 37m
including layover
Find flight
from$440
14:40 — 20:35
+1 day
14:40 — 17:05 VY8947 Vueling
London — Paris
3h 10m stop
20:15 — 22:15 N0301 N0
Paris — Newark
19h 15m stop
17:30 — 20:35 HA4901 Hawaiian Airlines
Newark — Seattle
37h 55m
including layover
Find flight
from$418
14:40 — 19:54
+1 day
14:40 — 17:05 VY8947 Vueling
London — Paris
3h 10m stop
20:15 — 22:15 N0301 N0
Paris — New York
18h 25m stop
16:40 — 19:54 HA4926 Hawaiian Airlines
New York — Seattle
37h 14m
including layover
Find flight
from$440
19:40 — 08:54
+2 days
19:40 — 22:05 VY8945 Vueling
London — Paris
18h 35m stop
16:40 — 19:05 N0311 N0
Paris — Los Angeles
10h 55m stop
06:00 — 08:54 HA6202 Hawaiian Airlines
Los Angeles — Seattle
45h 14m
including layover
Find flight
from$401
19:40 — 21:18
+2 days
19:40 — 22:05 VY8945 Vueling
London — Paris
20h 45m stop
18:50 — 21:00 BF720 Bluebird Cargo
Paris — Newark
21h 13m stop
18:13 — 21:18 HA4901 Hawaiian Airlines
Newark — Seattle
57h 38m
including layover
Find flight
from$425
21:20 — 21:36
+1 day
21:20 — 00:55 W46004 Aero Services Executive
London — Rome
10h 40m stop
11:35 — 15:15 N0411 N0
Rome — Los Angeles
3h 30m stop
18:45 — 21:36 HA6198 Hawaiian Airlines
Los Angeles — Seattle
32h 16m
including layover
Find flight
from$381
21:20 — 21:18
+2 days
21:20 — 00:55 W46004 Aero Services Executive
London — Rome
18h 10m stop
19:05 — 22:30 N0401 N0
Rome — Newark
19h 43m stop
18:13 — 21:18 HA4901 Hawaiian Airlines
Newark — Seattle
55h 58m
including layover
Find flight
from$406
22:15 — 19:32
+1 day
22:15 — 03:50 A3609 Aegean Airlines
London — Athens
5h 55m stop
09:45 — 13:15 N0511 N0
Athens — Los Angeles
3h 26m stop
16:41 — 19:32 F91177 Frontier Airlines
Los Angeles — Seattle
29h 17m
including layover
Find flight
from$523
*Departure and arrival times - local. Updated on August 2, 2025

Flight Information

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

Distance between London and Seattle is 7714 miles. Time difference between the cities is 8h. Airplanes depart 06:00 to 22:15 from 10 London airports and arrive 06:00 to 22:15 to 3 Seattle airports. Average flight time is 9h 45m.

  • The fastest flight 9h 45m
  • Average flight time 9h 45m
  • The earliest flight 06:00
  • The latest flight 22:15
  • Distance 4794 ml

The cheapest months to travel to Seattle are august (from 381 $), september (from 401 $), june (from 465 $).

The most expensive months are november (from 872 $), february (from 798 $), december (from 797 $).

What is the lowest airfare London to Seattle?

The cheapest plane ticket found by our users is $381. This airfare is for economy class on one-way W46004 flight by Aero Services Executive for August 28, 2025 which leaves Gatwick in London at 21:20 am and arrives at Seattle Seattle-Tacoma Intl at 21:36.

Economy class
$381
Find
Business class
?
Find
First class
?
Find

Popular Airlines on the Route

The flight London — Seattle is served by 25 regular airlines and 8 low-cost airlines. Most of the flights on this route are operated by British Airways - 22 departures per week at the price of from $ 508 . And the most expensive tickets are offered by British Airways airline - from $ 1696.

Direct flights

There are 7 nonstop flights on the route. The fastest direct flight is BA53 by British Airways takes 9h 45m and the cheapest is W46004 by Aero Services Executive for $508.

  • from $508
    Find
  • EI - Aer Lingus
    from $1088
    Find
  • AY - Finnair
    from $1039
    Find
  • IB - Iberia
    from $553
    Find
See more direct flights

Connecting Flights

There are 136 flights with layovers on the route. The fastest connecting flight is EI163 by Aer Lingus takes 12h 25m and the cheapest is W46004 by Aero Services Executive for $381.

  • from $534
    Find
  • W9 - Wizz Air UK
    from $440
    Find
  • VY - Vueling
    from $401
    Find
  • FI - Icelandair
    from $654
    Find
  • EI - Aer Lingus
    from $501
    Find
  • AF - Air France
    from $748
    Find
  • FR - Ryanair
    from $642
    Find
  • UA - United Airlines
    from $784
    Find
  • A3 - Aegean Airlines
    from $523
    Find
  • EW - Eurowings AG
    from $687
    Find
  • D8 - Djibouti Airlines
    from $523
    Find
  • DY - Norwegian
    from $656
    Find
See more connecting flights

Airports

You can fly from London to Seattle from 10 airports (London City, London-Waterloo, Heathrow, Luton, British Rail Terminal, London Biggin Hill, Stansted, Gatwick, Ebbsfleet International Rail St, Stratford International Rail St).

London airports

  • London City-LCY
    from $601
    Find
  • London-Waterloo-QQW
    Find
  • Heathrow-LHR
    from $501
    Find
  • Luton-LTN
    from $521
    Find
  • British Rail Terminal-ZLX
    Find
  • London Biggin Hill-BQH
    Find
  • Stansted-STN
    from $624
    Find
  • Gatwick-LGW
    from $381
    Find
  • Ebbsfleet International Rail St-XQE
    Find
  • Stratford International Rail St-XOF
    Find

Seattle airports

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

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.

Back