The flight distance from Denver International Airport (DEN) in Denver, United States to Washington Dulles International Airport (IAD) in Washington, United States is 2,329 kilometers (1,447 miles / 1,257 nautical miles). The estimated flight time for this route is approximately 4h, flying east at a heading of 84°.

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 2-hour time difference between the two cities.

Time zone information: When it's 00:15 in Denver, it's 02:15 in Washington.

There is a significant elevation difference of 5,122 feet between the two airports. Washington Dulles International Airport sits lower than Denver International Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Washington (IAD) to Denver (DEN) follows a heading of 281° (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 Denver International Airport (DEN) and Washington Dulles International Airport (IAD) detail pages, or use our flight duration calculator to compare other routes.