Cheap Flights from Seattle, WA to London from $150

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On Cheapflightsplus.com you will find 14 direct and 978 connecting flights from Seattle to London. You can compare airfare deals from 21 airlines and multiple travel sites from $150, 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: $150 (one-way), $257 (round-trip).

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Best Flights from Seattle to London Today

Take a look at the list of non stop flights and flights with layovers from Seattle to London with the lowest price of $150. The fastest direct flight takes 9h 20m and the fastest connecting – 11h 35m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $293 Find flight	13:30 Seattle Seattle-Tacoma Intl	06:50+1 день London Heathrow	9h 20m	British Airways	BA52
from $298 Find flight	13:30 Seattle Seattle-Tacoma Intl	06:50+1 день London Heathrow	9h 20m	Iberia	IB3508
from $311 Find flight	17:35 Seattle Seattle-Tacoma Intl	11:20+1 день London Heathrow	9h 45m	Air France	AF9905
from $311 Find flight	17:35 Seattle Seattle-Tacoma Intl	11:20+1 день London Heathrow	9h 45m	KLM	KL4823
from $339 Find flight	20:20 Seattle Seattle-Tacoma Intl	13:40+1 день London Heathrow	9h 20m	Iberia	IB3506
from $363 Find flight	17:35 Seattle Seattle-Tacoma Intl	11:20+1 день London Heathrow	9h 45m	Virgin Atlantic Airways	VS106
from $396 Find flight	13:30 Seattle Seattle-Tacoma Intl	06:50+1 день London Heathrow	9h 20m	Alaska Airlines	AS5272
from $439 Find flight	13:30 Seattle Seattle-Tacoma Intl	06:50+1 день London Heathrow	9h 20m	Finnair	AY5450
from $150 Find flight	15:45 Seattle Seattle-Tacoma Intl	11:45+1 день London Gatwick	12h 0m layover 1h 20m - Reykjavik	Icelandair	FI680 FI470
from $192 Find flight	23:30 Seattle Seattle-Tacoma Intl	11:45+2 дня London Gatwick	28h 15m layover 17h 35m - Reykjavik	Icelandair	FI684 FI470
from $202 Find flight	19:59 Seattle Seattle-Tacoma Intl	10:55+2 дня London Gatwick	30h 56m layover 17h 43m - Los Angeles	Hawaiian Airlines	HA6770 Z0712
from $205 Find flight	21:15 Seattle Seattle-Tacoma Intl	10:55+2 дня London Gatwick	29h 40m layover 16h 31m - Los Angeles	Alaska Airlines	AS1292 Z0712
from $215 Find flight	22:55 Seattle Seattle-Tacoma Intl	06:20+2 дня London Gatwick	23h 25m layover 11h 0m - New York	Hawaiian Airlines	HA6744 Z0702
from $217 Find flight	10:17 Seattle Seattle-Tacoma Intl	10:55+1 день London Gatwick	16h 38m layover 3h 20m - Los Angeles	Hawaiian Airlines	HA6762 Z0712
from $180 Find flight	19:00 Seattle Seattle-Tacoma Intl	20:10+1 день London Gatwick	17h 10m layover 1h 30m - Reykjavik 3h 10m - Oslo	Icelandair	FI682 FI322 DY1310
from $207 Find flight	23:30 Seattle Seattle-Tacoma Intl	19:40+2 дня London Gatwick	36h 10m layover 17h 20m - Reykjavik 5h 25m - Prague	Icelandair	FI684 FI536 W95776

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on June 02, 2025

Flight Schedule Seattle (Washington) to London

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	Flight Details	Flight Duration	Price
13:30 — 06:50 +1 day	13:30 — 06:50 BA52 British Airways Seattle — London	9h 20m	Find flight from$293
13:30 — 06:50 +1 day	13:30 — 06:50 IB3508 Iberia Seattle — London	9h 20m	Find flight from$298
13:30 — 06:50 +1 day	13:30 — 06:50 AS5272 Alaska Airlines Seattle — London	9h 20m	Find flight from$396
13:30 — 06:50 +1 day	13:30 — 06:50 AY5450 Finnair Seattle — London	9h 20m	Find flight from$439
17:35 — 11:20 +1 day	17:35 — 11:20 AF9905 Air France Seattle — London	9h 45m	Find flight from$311
17:35 — 11:20 +1 day	17:35 — 11:20 KL4823 KLM Seattle — London	9h 45m	Find flight from$311
17:35 — 11:20 +1 day	17:35 — 11:20 VS106 Virgin Atlantic Airways Seattle — London	9h 45m	Find flight from$363
20:20 — 13:40 +1 day	20:20 — 13:40 BA48 British Airways Seattle — London	9h 20m	Find flight from$293
20:20 — 13:40 +1 day	20:20 — 13:40 IB3506 Iberia Seattle — London	9h 20m	Find flight from$339
20:20 — 13:40 +1 day	20:20 — 13:40 AY5448 Finnair Seattle — London	9h 20m	Find flight from$446
20:20 — 13:40 +1 day	20:20 — 13:40 AS5270 Alaska Airlines Seattle — London	9h 20m	Find flight from$447
20:25 — 14:15 +1 day	20:25 — 14:15 KL6021 KLM Seattle — London	9h 50m	Find flight from$311
20:25 — 14:15 +1 day	20:25 — 14:15 AF3603 Air France Seattle — London	9h 50m	Find flight from$311
20:25 — 14:15 +1 day	20:25 — 14:15 VS4037 Virgin Atlantic Airways Seattle — London	9h 50m	Find flight from$373
15:45 — 11:45 +1 day	14:30 — 06:10 FI680 Icelandair Seattle — Reykjavik 1h 20m stop 07:45 — 10:50 FI470 Icelandair Reykjavik — London	12h including layover	Find flight from$150
15:45 — 11:55 +1 day	15:45 — 06:15 FI680 Icelandair Seattle — Reykjavik 1h 25m stop 07:40 — 11:55 FI450 Icelandair Reykjavik — London	12h 10m including layover	Find flight from$150
19:00 — 20:20 +1 day	19:00 — 09:25 FI682 Icelandair Seattle — Reykjavik 6h 45m stop 16:10 — 20:20 FI454 Icelandair Reykjavik — London	17h 20m including layover	Find flight from$150
19:00 — 11:55 +2 days	19:00 — 09:25 FI682 Icelandair Seattle — Reykjavik 22h 15m stop 07:40 — 11:55 FI450 Icelandair Reykjavik — London	32h 55m including layover	Find flight from$150
21:15 — 10:55 +2 days	21:15 — 23:59 AS1292 Alaska Airlines Seattle — Los Angeles 16h 31m stop 16:30 — 10:55 Z0712 Z0 Los Angeles — London	29h 40m including layover	Find flight from$205
22:55 — 06:20 +2 days	21:40 — 06:09 HA6744 Hawaiian Airlines Seattle — New York 11h stop 18:20 — 06:20 Z0702 Z0 New York — London	23h 25m including layover	Find flight from$215
23:30 — 20:20 +1 day	23:30 — 14:00 FI684 Icelandair Seattle — Reykjavik 2h 10m stop 16:10 — 20:20 FI454 Icelandair Reykjavik — London	12h 50m including layover	Find flight from$150
23:30 — 11:55 +2 days	23:30 — 14:00 FI684 Icelandair Seattle — Reykjavik 17h 40m stop 07:40 — 11:55 FI450 Icelandair Reykjavik — London	28h 25m including layover	Find flight from$150

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times - local. Updated on June 2, 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 05:25 to 23:59 from 3 Seattle airports and arrive 05:25 to 23:59 to 10 London airports. Average flight time is 9h 20m.

The fastest flight 9h 20m
Average flight time 9h 20m
The earliest flight 05:25
The latest flight 23:59
Distance 4794 ml

The cheapest months to travel to London are july (from 200 $), august (from 200 $), october (from 208 $).

The most expensive months are december (from 616 $), february (from 556 $), january (from 498 $).

What is the lowest airfare Seattle to London?

The cheapest plane ticket found by our users is $150. This airfare is for economy class on one-way FI680 flight by Icelandair for August 7, 2025 which leaves Seattle-Tacoma Intl in Seattle at 15:45 am and arrives at London Heathrow at 20:20.

Economy class

$150

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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 21 regular airline and 4 low-cost airlines. Most of the flights on this route are operated by KLM - 19 departures per week at the price of from $ 311 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 447.

Direct flights

There are 14 nonstop flights on the route. The fastest direct flight is BA52 by British Airways takes 9h 20m and the cheapest is FI680 by Icelandair for $293.

KL - KLM

from $311

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AS - Alaska Airlines

from $396

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AF - Air France

from $311

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AY - Finnair

from $439

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IB - Iberia

from $298

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VS - Virgin Atlantic Airways

from $363

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BA - British Airways

from $293

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See more direct flights

Connecting Flights

There are 978 flights with layovers on the route. The fastest connecting flight is FI682 by Icelandair takes 11h 35m and the cheapest is FI680 by Icelandair for $150.

KL - KLM

from $311

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AC - Air Canada

from $297

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FI - Icelandair

from $150

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EI - Aer Lingus

from $367

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OS - Austrian Airlines

from $388

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AF - Air France

from $311

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SY - Sun Country Airlines

from $242

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UA - United Airlines

from $318

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LX - SWISS International Air Lines

from $327

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AS - Alaska Airlines

from $205

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F9 - Frontier Airlines

from $224

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SK - SAS

from $285

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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 $150
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Kenmore Air Harbor SPB-LKE

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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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Airplanes

There are flights to London from Seattle by 21 airlines that use 1 aircraft brands. They range from huge modern airplanes to small-sized.

Boeing 767-300 (winglets)

from $150

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Top Domestic Destinations from Seattle

You may also consider searching for discounted plane tickets to some other popular places from Seattle within United States.

Seattle — Washington D.C.

from $78

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Seattle — Las Vegas

from $62

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Seattle — New York

from $180

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Seattle — Chicago

from $73

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Seattle — Phoenix

from $67

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Seattle — San Diego

from $74

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Seattle — Los Angeles

from $53

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Seattle — Denver

from $243

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Seattle — Dallas

from $72

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Seattle — Boston

from $63

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Top International Destinations from Seattle

Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.

Seattle — Tokyo

from $77

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Seattle — London

from $70

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Seattle — Vancouver

from $57

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Seattle — Cancun

from $63

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Seattle — Paris

from $66

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Seattle — Toronto

from $64

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Seattle — Calgary

from $76

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Seattle — Mumbai

from $80

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Seattle — Montreal

from $68

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Seattle — Amsterdam

from $64

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How to book a plane 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.