The flight distance from Washington Dulles International Airport (IAD) in Washington, United States to Xieng Khouang Airport (XKH) in Xieng Khouang, Laos is 13,526 kilometers (8,405 miles / 7,304 nautical miles). The estimated flight time for this route is approximately 17h, flying north at a heading of 359°.

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 Laos. 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 14:35 in Washington, it's 02:35 in Xieng Khouang. With a 12-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 3,133 feet between the two airports. Xieng Khouang Airport sits higher than Washington Dulles International Airport.

The return flight from Xieng Khouang (XKH) to Washington (IAD) follows a heading of 1° (north). 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 Xieng Khouang Airport (XKH) detail pages, or use our flight duration calculator to compare other routes.