The flight distance from Washington Dulles International Airport (IAD) in Washington, United States to El Tari Airport (KOE) in Kupang-Timor Island, Indonesia is 16,191 kilometers (10,061 miles / 8,742 nautical miles). The estimated flight time for this route is approximately 20h, flying northwest at a heading of 321°.

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 Indonesia. 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 18:24 in Washington, it's 06:24 in Kupang-Timor Island. 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.

The return flight from Kupang-Timor Island (KOE) to Washington (IAD) follows a heading of 30° (north northeast). 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 El Tari Airport (KOE) detail pages, or use our flight duration calculator to compare other routes.