Search flights from Seattle (SEA) to London (LON)

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Cheapest flights to London

The cheapest flights available in the next 60 days – prices are updated regularly

Flying from Seattle to London: things to know

The most popular route is from Sea-Tac Airport in Seattle to London Heathrow Airport in London. On average this flight takes 11 hours 3 minutes one-way and costs $1,618 round-trip.

Most popular route
Sea-Tac Airport (SEA) to London Heathrow Airport (LHR)
Average flight time
11 hours 3 minutes
Average round-trip price
$1,618
Fly from Seattle to London
20 airlines

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Airlines that fly from Seattle to London

Airline options may vary according to recently booked flights and your search terms

  • Virgin Atlantic
  • Icelandair
  • British Airways
  • Iberia
  • Westjet
  • Aer Lingus
  • American Airlines
  • Air Canada
  • Scandinavian Airlines
  • United Airlines
  • Air France
  • Finnair
  • Lufthansa
  • Condor
  • KLM
  • Turkish Airlines

Frequently asked questions

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Flights to London Heathrow Airport

Jet into this airport to explore London at your leisure. Compare flights, fares, and airlines – all in one place.

Flights to London Gatwick Airport

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Flights from the United States to the United Kingdom

More options to fly to the United Kingdom.

Flights from Seattle to the United Kingdom

Plan your next getaway from Seattle.

Flights to England

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Flights to Greater London

Getting to Greater London just got easier!

Flights to Middlesex

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Hotels in London

A popular choice with visitors to the United Kingdom.

All flights

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