Cheap flights from London to Seattle

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The best prices from London to Seattle are usually found in October or September, booked 60 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Return
Economy
Thu 29/10
Thu 5/11
From
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To
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Leaving on
Thu 29/10
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To
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To
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To
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To
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From
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To
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How to find the cheapest flight from
London (LON) to Seattle (SEA)

LON - SEA
Price
£365 - £617
SEA
Temperature
8 - 25 °C
SEA
Rainfall
18 - 166 mm

Popular in

July

High demand for flights, 26% potential price rise

Cheapest in

October

Best time to find cheap flights, 20% potential price drop

Round-trip from

£365

From London to Seattle

One-way from

£227

One-way flight from London to Seattle

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?

Saturday flights are generally found to be more expensive for flights from London to Seattle. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

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

Travellers have found it’s best to book a flight 61 days in advance to save up to 31% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 61 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Seattle 1-2 weeks in advance for as low as £545, or £660 for flights within the next 24 hours.

What is the cheapest month to fly from London to Seattle?

The best pricing can be found in the month of October. Prices to Seattle from London average £457. You can even find prices in October for less than £457, as users have found deals to Seattle from as low as £316. The month of July appears to be one of the more expensive times to travel to Seattle from London. Flying in the targeted month can save you up to 34%.

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

It’s optimal to fly from London to Seattle at midday. By choosing this option you can save up to 11% on the cost of your flight, compared to a flight in the afternoon.

Cheap flights from London to Seattle in October, November 2020

The best prices found for LON to SEA flights in October, November
25 Nov - 2 Dec
£358pp
LHR
London Heathrow
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
LHR
London Heathrow
23 Nov - 30 Nov
£363pp
LHR
London Heathrow
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
LHR
London Heathrow
20 Nov - 3 Dec
£373pp
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 2020 flight deals

Cheap flights to Seattle from London found for this year
24 Dec - 2 Jan
£357pp
LGW
London Gatwick
Multiple airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
LGW
London Gatwick
25 Nov - 2 Dec
£358pp
LHR
London Heathrow
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
LHR
London Heathrow
24 Dec - 2 Jan
£362pp
STN
London Stansted
Multiple airlines
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted

Direct flights to Seattle from London

Save time with London to Seattle direct flight deals
1 Feb - 8 Feb
£409pp
LHR
London Heathrow
KLM
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
KLM
Direct
LHR
London Heathrow
20 Nov - 3 Dec
£415pp
LHR
London Heathrow
Multiple airlines
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air France
Direct
LHR
London Heathrow
1 Dec - 15 Dec
£417pp
LHR
London Heathrow
KLM
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
KLM
Direct
LHR
London Heathrow

Last-minute flights from London to Seattle

Late deals on return flights to Seattle from London, departing today and this week
29 Oct - 15 Nov
£405pp
LHR
London Heathrow
Lufthansa
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow
31 Oct - 10 Dec
£405pp
LHR
London Heathrow
Lufthansa
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
 
1 STOP
LHR
London Heathrow
28 Oct - 12 Nov
£406pp
LHR
London Heathrow
Lufthansa
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Lufthansa
   
2 STOPS
LHR
London Heathrow

One-way flights to Seattle from London

The cheapest one-way flights from London to Seattle
01:30 - 06:46
Delta
1 stop
13h 16m
LHR - SEA
Delta
£228
Delta
01:30 - 06:46
Delta
1 stop
13h 16m
LHR - SEA
Delta
£231
Delta
02:30 - 08:46
Delta
1 stop
13h 16m
LHR - SEA
Delta
£232
Delta

Related info for your journey

Useful info, stats and facts about London to Seattle flights.

Flight FAQs

From London to Seattle

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 for under £383 on Cheapflights?

Yes, there are multiple flights from London to Seattle for under £383. The cheapest flight booked recently is on Delta for just £357, but on average you can expect to pay £372.

Are there direct flights from London to Seattle for under £459 on Cheapflights?

Cheapflights has 20 direct flights from London to Seattle under £459. A good price for a direct flight from London to Seattle is less than £444.

Are there last-minute flights available from London to Seattle for under £459?

There are currently 20+ open flights from London to Seattle within the next 7 days for less than £459.

How many flights depart from London to Seattle on average per day?

Per day, 5 flights depart from London to Seattle/Tacoma Intl on average.
Afternoon (Midday - 6pm) - 100% of flight departures

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?

There are many flights that can get you from London to Seattle in 12h 45m. Fly via Icelandair, Delta, or KLM to get the fastest option. There are 4812 mi between London and Seattle. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

Delta, at £358, was found to be the cheapest airline from London to Seattle.Alternate airlines flying return to your destination include Icelandair and United Airlines. Users have found that Delta is 21% cheaper than the other options available to this destination.

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

For one-way options, check prices for Delta. According to our data, you can fly for as low as £228.

Alternative routes for London to Seattle

Destination information for Seattle

Things to know before you go. Useful info for your trip from London to Seattle
Today's exchange rate
£1 = $1.31
Average temperature for October in Seattle
16.0 °C
Avg rainfall for October in Seattle
88.0 mm

Airports servicing London

Heathrow (LHR)
Luton (LTN)
Stansted (STN)
City (LCY)
Southend (SEN)

Airports servicing Seattle

Hourly flight availability from London to Seattle

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
Sunday
0 flights
Monday
0 flights
Tuesday
0 flights
Wednesday
5 daily flights
Thursday
0 flights
Friday
5 daily flights
Saturday
0 flights
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