The flight distance from Boeing Field/King County International Airport (BFI) in Seattle, United States to Washington Dulles International Airport (IAD) in Washington, United States is 3,700 kilometers (2,299 miles / 1,998 nautical miles). The estimated flight time for this route is approximately 5h, flying east at a heading of 88°.

This is a medium-haul route that may be operated by either narrow-body or wide-body aircraft depending on demand. Passengers can expect a meal service on most carriers.

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 04:54 in Seattle, it's 07:54 in Washington. The 3-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Washington (IAD) to Seattle (BFI) follows a heading of 300° (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 Washington Dulles International Airport (IAD) detail pages, or use our flight duration calculator to compare other routes.