Cheap flights from Seattle to London
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Travel tip: Big Ben is great!Check our current prices for flights from Seattle to London. Please note that we also give you historical search data for this city connection. These are all airfares that people found in the past, in order to find more current flight information from Seattle to London, you will need to run a search below.
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Cheap London airfares from $736/RT are provided by Cheapoair.com. Outbound flight is leaving on 05/12/2025, 02:55 pm from Seattle/tacoma Sea/tac (SEA) airport and arrives at London Heathrow (LHR) at 01:20 pm. The flight time is 22 hours and 25 minutes. The Returning flight departes on 05/29/2025, 06:30 am (other return dates are also available). Date posted: 07 Jan 2025
Price evolution for flights From Seattle To London
Recent Deals on Flights from Seattle to London:Roundtrip / Oneway
- $736
Lufthansa
cheapoair.com check priceFrom To Departure Time Seattle, WA (SEA) London, GB (LHR) 05/12/2025 02:55 pm London, GB (LHR) Seattle, WA (SEA) 05/29/2025 06:30 am - $759
British Airways
cheapoair.com check priceFrom To Departure Time Seattle, WA (SEA) London, GB (LHR) 05/12/2025 01:30 pm London, GB (LHR) Seattle, WA (SEA) 05/29/2025 09:50 am - $928
Iceland Air
cheapoair.com check priceFrom To Departure Time Seattle, WA (SEA) London, GB (LHR) 07/08/2025 11:00 pm London, GB (LHR) Seattle, WA (SEA) 07/19/2025 09:25 pm - $1043
Multiple Airlines
cheapoair.com check priceFrom To Departure Time Seattle, WA (SEA) London, GB (LHR) 07/08/2025 02:20 pm London, GB (LHR) Seattle, WA (SEA) 07/19/2025 08:40 am - $1069 Iceland Air
cheapoair.com check priceFrom To Departure Time Seattle, WA (SEA) London, GB (LHR) 06/20/2025 11:30 pm London, GB (LHR) Seattle, WA (SEA) 07/06/2025 09:25 pm - We are sorry but currently there are no oneway offers for flights from Seattle to London.
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Know what to do when flying to London?
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