The flight distance from Boeing Field/King County International Airport (BFI) in Seattle, United States to London Heathrow Airport (LHR) in London, United Kingdom is 7,694 kilometers (4,781 miles / 4,155 nautical miles). The estimated flight time for this route is approximately 10h, flying northeast at a heading of 34°.

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

This is an international route connecting United States with United Kingdom. It is an intercontinental flight between North America and Europe. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 17:28 in Seattle, it's 01:28 in London. With a 8-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

The return flight from London (LHR) to Seattle (BFI) follows a heading of 322° (northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Boeing Field/King County International Airport (BFI) and London Heathrow Airport (LHR) detail pages, or use our flight duration calculator to compare other routes.