The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to Udon Thani Airport (UTH) in Udon Thani, Thailand is 2,122 kilometers (1,318 miles / 1,146 nautical miles). The estimated flight time for this route is approximately 3h, flying east southeast at a heading of 119°.

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 an international route connecting Nepal with Thailand. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 00:25 in Kathmandu, it's 01:40 in Udon Thani.

There is a significant elevation difference of 3,811 feet between the two airports. Udon Thani Airport sits lower than Tribhuvan International Airport.

The return flight from Udon Thani (UTH) to Kathmandu (KTM) follows a heading of 306° (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 Tribhuvan International Airport (KTM) and Udon Thani Airport (UTH) detail pages, or use our flight duration calculator to compare other routes.