Cheap flights from London to Seattle-Tacoma International

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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 Wednesday and return on a Tuesday

Return
Economy
Thu 3/12
Thu 10/12
From
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To
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Leaving on
Thu 3/12
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To
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To
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To
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To
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To
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How to find the cheapest flight from
London (LON) to Seattle-Tacoma International (SEA)

LON - SEA
Price
£337 - £563

Popular in

July

High demand for flights, 27% potential price rise

Cheapest in

February

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

Average price

£377

Average for round-trip flights in November 2020

Round-trip from

£337

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 £463 1-2 weeks out and tickets from £607 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 £409 on average during February, but can be found for as low as £269.

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 11% on flights from London to Seattle-Tacoma International by exploring options for tickets at midday.

Cheap flights from London to Seattle-Tacoma International in November, December 2020

The best prices found for LON to SEA flights in November, December
18 Dec - 6 Jan
£310pp
LCY
London City
Virgin Atlantic
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
 
1 STOP
LCY
London City
18 Dec - 6 Jan
£323pp
LHR
London Heathrow
Virgin Atlantic
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
 
1 STOP
LHR
London Heathrow
24 Dec - 31 Dec
£333pp
LHR
London Heathrow
United Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
United Airlines
   
2 STOPS
LHR
London Heathrow

London to Seattle-Tacoma International 2021 flight deals

Cheap flights to Seattle-Tacoma International from London found for next year
18 Dec - 6 Jan
£310pp
LCY
London City
Virgin Atlantic
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
 
1 STOP
LCY
London City
18 Dec - 6 Jan
£323pp
LHR
London Heathrow
Virgin Atlantic
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
 
1 STOP
LHR
London Heathrow
24 Dec - 31 Dec
£333pp
LHR
London Heathrow
United Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
United Airlines
   
2 STOPS
LHR
London Heathrow

Direct flights to Seattle-Tacoma International from London

Save time with London to Seattle-Tacoma International direct flight deals
6 May - 26 May
£364pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
28 Jan - 22 Mar
£367pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
18 Jan - 24 Jan
£369pp
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
5 Dec - 16 Dec
£343pp
LHR
London Heathrow
Virgin Atlantic
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
   
2 STOPS
LHR
London Heathrow
5 Dec - 18 Dec
£350pp
LHR
London Heathrow
United Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
United Airlines
 
1 STOP
LHR
London Heathrow
5 Dec - 16 Dec
£351pp
LHR
London Heathrow
United Airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
United Airlines
   
2 STOPS
LHR
London Heathrow

One-way flights to Seattle-Tacoma International from London

The cheapest one-way flights from London to Seattle-Tacoma International
14:35 - 15:53
Austrian Airlines
2 stops
33h 18m
LHR - SEA
Austrian Airlines
£265
aua.com
12:05 - 06:40
Virgin Atlantic
1 stop
26h 35m
LHR - SEA
Virgin Atlantic
£270
Tripmonster
06:05 - 15:53
Brussels Airlines
2 stops
41h 48m
LHR - SEA
Brussels Airlines

Related info for your journey

Useful info, stats and facts about London to Seattle-Tacoma International 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.

Can I find flights from London to Seattle-Tacoma International for under £374 on Cheapflights?

Yes, there are multiple flights from London to Seattle-Tacoma International for under £374. The cheapest flight booked recently is on Virgin Atlantic for just £310, but on average you can expect to pay £326.

Are there direct flights from London to Seattle-Tacoma International for under £374 on Cheapflights?

Cheapflights has 20 direct flights from London to Seattle-Tacoma International under £374. A good price for a direct flight from London to Seattle-Tacoma International is less than £379.

Are there last-minute flights available from London to Seattle-Tacoma International for under £374?

There are currently 20+ open flights from London to Seattle-Tacoma International within the next 7 days for less than £374.

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, Virgin Atlantic, and Aer Lingus 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 1h 40m. This flight may include one or multiple stops.

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

Flying on Virgin Atlantic is currently your cheapest option to Seattle-Tacoma International, with prices starting at £310. Additional return tickets that might be worth considering are offered by Icelandair and United Airlines, with the lowest prices starting at £325 and £334, respectively. Virgin Atlantic is 24% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from London to Seattle-Tacoma International one-way?

£259 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on Austrian Airlines and Virgin Atlantic, with prices starting from £265 and £270, respectively.

Alternative routes for London to Seattle-Tacoma International

Destination information for Seattle-Tacoma International

Things to know before you go. Useful info for your trip from London to Seattle-Tacoma International
Today's exchange rate
£1 = $1.34

Airports servicing London

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

Airports servicing Seattle

Top 10 airlines 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 change fee 78%
Search Austrian Airlines flights
Norwegian
£426 £582 No cancel fee 74%
Search Norwegian flights
Lufthansa
£374 £625 No change fee 76%
Search Lufthansa flights
Air Canada
£358 £634 No cancel fee 67%
Search Air Canada flights
SWISS
£510 £666 No change fee 79%
Search SWISS flights
Iberia
£402 £690 No change fee 77%
Search Iberia flights
KLM
£388 £697 No change 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 change fee 77%
Search Air France flights

Hourly flight availability from London to Seattle-Tacoma International

Afternoon Midday to 6 PM 100% of flight departures
Early morning Midnight to 6 AM 0% of flight departures
Morning 6 AM to midday 0% 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
Sunday
0 flights
Monday
5 daily flights
Tuesday
0 flights
Wednesday
5 daily flights
Thursday
0 flights
Friday
5 daily flights
Saturday
0 flights
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