The flight distance from Washington Dulles International Airport (IAD) in Washington, United States to Khost Airport (KHT) in Khost, Afghanistan is 11,310 kilometers (7,028 miles / 6,107 nautical miles). The estimated flight time for this route is approximately 14h, flying north northeast at a heading of 27°.

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

This is an international route connecting United States with Afghanistan. It is an intercontinental flight between North America and Asia. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 09:47 in Washington, it's 19:17 in Khost. With a 9.5-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

There is a significant elevation difference of 3,444 feet between the two airports. Khost Airport sits higher than Washington Dulles International Airport.

The return flight from Khost (KHT) to Washington (IAD) follows a heading of 335° (north 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 Washington Dulles International Airport (IAD) and Khost Airport (KHT) detail pages, or use our flight duration calculator to compare other routes.