Cheap flights from London to Seattle

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

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 £414, or £502 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 £456. You can even find prices in October for less than £456, as users have found deals to Seattle from as low as £315. 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 - 03A)?

It’s optimal to fly from London to Seattle in the 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 August, September 2020

The best prices found for LON to SEA flights in August, September
31 Aug - 18 Sep
£453pp
LGW
London Gatwick
Multiple airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
LGW
London Gatwick
31 Aug - 18 Sep
£453pp
STN
London Stansted
Multiple airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted
31 Aug - 15 Sep
£454pp
LGW
London Gatwick
Multiple airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
LGW
London Gatwick

London to Seattle 2020 flight deals

Cheap flights to Seattle from London found for this year
1 Sep - 14 Sep
£405pp
STN
London Stansted
Multiple airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
STN
London Stansted
1 Sep - 14 Sep
£405pp
LGW
London Gatwick
Multiple airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
   
2 STOPS
LGW
London Gatwick
1 Sep - 18 Sep
£410pp
STN
London Stansted
Multiple airlines
     
3 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
9 Dec - 16 Dec
£476pp
LHR
London Heathrow
Virgin Atlantic
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Virgin Atlantic
Direct
LHR
London Heathrow
8 Dec - 17 Dec
£479pp
LHR
London Heathrow
Multiple airlines
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
British Airways
Direct
LHR
London Heathrow
26 Oct - 16 Nov
£484pp
LHR
London Heathrow
Multiple airlines
Direct
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Finnair
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
28 Jul - 3 Sep
£830pp
LHR
London Heathrow
Finnair
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Finnair
 
1 STOP
LHR
London Heathrow
26 Jul - 3 Sep
£868pp
LHR
London Heathrow
Finnair
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Finnair
 
1 STOP
LHR
London Heathrow
26 Jul - 3 Sep
£883pp
LHR
London Heathrow
Multiple airlines
     
3 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Multiple Airlines
     
3 STOPS
LHR
London Heathrow

One-way flights to Seattle from London

The cheapest one-way flights from London to Seattle
02:00 - 13:55
Multiple Airlines
1 stop
19h 55m
LTN - SEA
Multiple Airlines
£264
Kiwi.com
04:45 - 13:55
Multiple Airlines
2 stops
41h 10m
STN - SEA
Multiple Airlines
£255
Kiwi.com
14:20 - 13:55
Multiple Airlines
2 stops
55h 35m
STN - SEA
Multiple Airlines
£259
Kiwi.com

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.

Can I find flights from London to Seattle for under £500 on Cheapflights?

Yes, there are multiple flights from London to Seattle for under £500. The cheapest flight booked recently is on Multiple Airlines for just £405, but on average you can expect to pay £416.

Are there direct flights from London to Seattle for under £500 on Cheapflights?

Cheapflights has 20 direct flights from London to Seattle under £500. A good price for a direct flight from London to Seattle is less than £501.

Are there last-minute flights available from London to Seattle for under £900?

There are currently 20+ open flights from London to Seattle within the next 7 days for less than £900.

Is London weather warmer or cooler than Seattle?

You can imagine temperatures to be in the 25 °C range in July. The weather in Seattle is generally hotter than London's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.

How long does is the flight from London to Seattle?

There are many flights that can get you from London to Seattle in 9h 55m. Fly via British Airways, Icelandair, or Lufthansa to get the fastest option. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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 = $1.32
Average temperature for August in Seattle
25.0 °C
Avg rainfall for August in Seattle
28.0 mm

Airports servicing London

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

Airports servicing Seattle

Seattle King County/Boeing (BFI)
Seattle Lake Union Spb (LKE)

Hourly flight availability from London to Seattle

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