The flight distance from Washington Dulles International Airport (IAD) in Washington, United States to Seattle-Tacoma International Airport (SEA) in Seattle, United States is 3,701 kilometers (2,300 miles / 1,998 nautical miles). The estimated flight time for this route is approximately 5h, flying west northwest at a heading of 300°.

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 04:41 in Washington, it's 01:41 in Seattle. The 3-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Seattle (SEA) to Washington (IAD) follows a heading of 88° (east). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Washington Dulles International Airport (IAD) and Seattle-Tacoma International Airport (SEA) detail pages, or use our flight duration calculator to compare other routes.