The flight distance from St Louis Regional Airport (ALN) in Alton/St Louis, United States to Washington Dulles International Airport (IAD) in Washington, United States is 1,085 kilometers (674 miles / 586 nautical miles). The estimated flight time for this route is approximately 2h, flying east at a heading of 86°.

This is a short-haul route typically served by narrow-body aircraft such as the Boeing 737 or Airbus A320 family. In-flight service is usually limited to drinks and light snacks.

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 1-hour time difference between the two cities.

Time zone information: When it's 08:48 in Alton/St Louis, it's 09:48 in Washington.

The return flight from Washington (IAD) to Alton/St Louis (ALN) follows a heading of 274° (west). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the St Louis Regional Airport (ALN) and Washington Dulles International Airport (IAD) detail pages, or use our flight duration calculator to compare other routes.