The flight distance from Columbia Gorge Regional/The Dalles Municipal Airport (DLS) in The Dalles, United States to Tribhuvan International Airport (KTM) in Kathmandu, Nepal is 11,433 kilometers (7,104 miles / 6,173 nautical miles). The estimated flight time for this route is approximately 14h, flying north northwest at a heading of 336°.

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 Nepal. 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 00:05 in The Dalles, it's 12:50 in Kathmandu. With a 12.75-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 4,144 feet between the two airports. Tribhuvan International Airport sits higher than Columbia Gorge Regional/The Dalles Municipal Airport.

The return flight from Kathmandu (KTM) to The Dalles (DLS) follows a heading of 19° (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 Columbia Gorge Regional/The Dalles Municipal Airport (DLS) and Tribhuvan International Airport (KTM) detail pages, or use our flight duration calculator to compare other routes.