The flight distance from Boeing Field/King County International Airport (BFI) in Seattle, United States to General Edward Lawrence Logan International Airport (BOS) in Boston, United States is 4,003 kilometers (2,487 miles / 2,161 nautical miles). The estimated flight time for this route is approximately 6h, flying east at a heading of 79°.

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 a domestic route within United States. Both airports operate in the same country, which may simplify travel requirements and documentation. Despite being a domestic route, there is a 3-hour time difference between the two cities.

Time zone information: When it's 14:02 in Seattle, it's 17:02 in Boston. The 3-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Boston (BOS) to Seattle (BFI) follows a heading of 296° (west 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 General Edward Lawrence Logan International Airport (BOS) detail pages, or use our flight duration calculator to compare other routes.