Cheap flights from London to Seattle-Tacoma International

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Seattle (SEA)
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The best prices from London to Seattle-Tacoma International are usually found in February or March, booked 54 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

How to find the cheapest flight from
London (LON) to Seattle-Tacoma International (SEA)

All the information you need to plan the best LON to SEA flight in 2021: compare London to Seattle-Tacoma International flight prices with the expected peak season, weather and rainfall in Seattle-Tacoma International.
LON - SEA
Price
£324 - £542

Popular in

July

High demand for flights, 27% potential price rise

Cheapest in

February

Best time to find cheap flights, 18% potential price drop

Round-trip from

£324

From London to Seattle-Tacoma International

One-way from

£229

One-way flight from London to Seattle-Tacoma International

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly return from London to Seattle-Tacoma International?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 16% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from London to Seattle-Tacoma International?

To save up to 51% on this flight, we recommend booking at least 52 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from London to Seattle-Tacoma International from £446 1-2 weeks out and tickets from £584 for flights departing within the next 72 hours.

What is the cheapest month to fly from London to Seattle-Tacoma International?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to Seattle-Tacoma International. Flights to Seattle-Tacoma International from London in February are about £394 on average during February, but can be found for as low as £259.

When is the cheapest time to fly from London to Seattle-Tacoma International (LON - SEA)?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 16% on flights from London to Seattle-Tacoma International by exploring options for tickets in the evening.

Cheap flights from London to Seattle-Tacoma International in May, June 2021

The best prices found for LON to SEA flights in May, June
22 Jun - 13 Jul
£394pp
LHR
London Heathrow
Lufthansa
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow
18 Jun - 11 Jul
£396pp
LHR
London Heathrow
Lufthansa
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow
22 Jun - 13 Jul
£396pp
LHR
London Heathrow
Multiple airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow

London to Seattle-Tacoma International 2021 flight deals

Cheap flights to Seattle-Tacoma International from London found for this year
19 Jul - 13 Aug
£335pp
LGW
London Gatwick
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LGW
London Gatwick
2 Aug - 19 Aug
£337pp
LGW
London Gatwick
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LGW
London Gatwick
19 Jul - 13 Aug
£346pp
LHR
London Heathrow
Icelandair
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Icelandair
 
1 STOP
LHR
London Heathrow

Direct flights to Seattle-Tacoma International from London

Save time with London to Seattle-Tacoma International direct flight deals
2 Jun - 9 Jun
£421pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
2 Jun - 9 Jun
£425pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
22 Jun - 13 Jul
£430pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow

Last-minute flights from London to Seattle-Tacoma International

Late deals on return flights to Seattle-Tacoma International from London, departing today and this week
14 May - 4 Jun
£494pp
LHR
London Heathrow
Finnair
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Finnair
 
1 STOP
LHR
London Heathrow
14 May - 28 May
£496pp
LHR
London Heathrow
Finnair
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Finnair
Direct
LHR
London Heathrow
14 May - 4 Jun
£500pp
LHR
London Heathrow
Lufthansa
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow

One-way flights to Seattle-Tacoma International from London

The cheapest one-way flights from London to Seattle-Tacoma International
04:15 - 07:20
Multiple Airlines
2 stops
35h 05m
STN - SEA
Multiple Airlines
£230
Kiwi.com
04:25 - 07:20
Multiple Airlines
2 stops
34h 55m
STN - SEA
Multiple Airlines
£234
Kiwi.com
05:15 - 07:20
Multiple Airlines
2 stops
34h 05m
STN - SEA
Multiple Airlines
£238
Kiwi.com

Related info for your journey

Useful info, stats and facts about <span class="emphasized">London</span> to <span class="emphasized">Seattle-Tacoma International</span> flights.

Flight FAQs

From London to Seattle-Tacoma International

Are flight prices decreasing from London to Seattle due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both London and Seattle for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from London to Seattle/Tacoma Intl to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Delta is one of them. Airline carriers are regularly disinfecting and sanitising their aircraft. Masks are provided and are mandatory while on board. Pre-flight testing for symptoms and antibodies, alongside socially-distanced seating (for a limited time) will work towards keeping travellers safer while flying from London to Seattle/Tacoma Intl. Policies will vary by airline.

Which airlines flying from London to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

Some of our airline partners flying from London to Seattle/Tacoma Intl have new flexible policies in place due to COVID-19. British Airways, Virgin Atlantic, and United Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like British Airways with this kind of flexibility.

What airport do you fly into for flights to Seattle from London?

Located just 11.4 mi from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Seattle from London. Booking flights from London to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 6 daily inbound flights from London from 18 different airlines.

Can I find flights from London to Seattle-Tacoma International for under £360 on Cheapflights?

Yes, there are multiple flights from London to Seattle-Tacoma International for under £360. The cheapest flight booked recently is on Icelandair for just £335, but on average you can expect to pay £367.

Are there direct flights from London to Seattle-Tacoma International for under £432 on Cheapflights?

Cheapflights has 20 direct flights from London to Seattle-Tacoma International under £432. A good price for a direct flight from London to Seattle-Tacoma International is less than £457.

Are there last-minute flights available from London to Seattle-Tacoma International for under £504?

There are currently 20+ open flights from London to Seattle-Tacoma International within the next 7 days for less than £504.

Is London weather warmer or cooler than Seattle?

Our data indicates that the weather will be 25 °C on average in the month of July. The temperature in Seattle is typically hotter than in London. If you're traveling when the temperature is at its warmest, push to plan early, as flight price and availability will have an impact on your travels. For the best results, search for flights well in advance or after peak season.

How long does is the flight from London to Seattle-Tacoma International?

Airlines like Icelandair fly from London to Seattle-Tacoma International in about 12h 45m. The time it takes to get you to your destination can typically vary by up to .

What are the cheapest airlines to flying from London to Seattle-Tacoma International return?

Flying on Icelandair is currently your cheapest option to Seattle-Tacoma International, with prices starting at £336. Another option worth looking into is Lufthansa, starting at £391 return. Icelandair is 14% cheaper than the average price of flights available within the next 90 days to this destination.

Alternative routes for London to Seattle-Tacoma International

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Seattle-Tacoma International

Things to know before you go - useful duration and weather info for your trip from London to Seattle-Tacoma International.
Today's exchange rate
£1 = $1.39

Airports servicing London

Gatwick (LGW)
City (LCY)
Stansted (STN)
Luton (LTN)
Southend (SEN)

Airports servicing Seattle

Top 10 airlines flying from London to Seattle-Tacoma International

The chart below displays the airlines Cheapflights users travelling from London to Seattle-Tacoma International choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Austrian Airlines
£311 £439 No cancel fee 78%
Search Austrian Airlines flights
Norwegian
£426 £582 No cancel fee 74%
Search Norwegian flights
Lufthansa
£374 £625 No cancel fee 76%
Search Lufthansa flights
Air Canada
£358 £634 No cancel fee 67%
Search Air Canada flights
SWISS
£510 £666 No cancel fee 79%
Search SWISS flights
Iberia
£402 £690 No cancel fee 77%
Search Iberia flights
KLM
£388 £697 No cancel fee 75%
Search KLM flights
Norwegian Air UK
£386 £707 No cancel fee N/A
Search Norwegian Air UK flights
Icelandair
£444 £750 No cancel fee 76%
Search Icelandair flights
Air France
£415 £762 No cancel fee 77%
Search Air France flights

Hourly flight availability from London to Seattle-Tacoma International

See what time of day planes typically take off from London towards Seattle-Tacoma International.
Morning 6 AM to midday 53% of flight departures
Afternoon Midday to 6 PM 46% of flight departures
Early morning Midnight to 6 AM 1% of flight departures
Evening 6 PM to midnight 0% of flight departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from London to Seattle-Tacoma International
See how many times per day planes take to the skies headed from London to Seattle-Tacoma International.
Sunday
7 daily flights
Monday
5 daily flights
Tuesday
5 daily flights
Wednesday
9 daily flights
Thursday
5 daily flights
Friday
9 daily flights
Saturday
5 daily flights
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