The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to Colombo Int Arpt Ratmalana Airport (RML) in Colombo, Sri Lanka is 2,392 kilometers (1,486 miles / 1,292 nautical miles). The estimated flight time for this route is approximately 4h, flying south southwest at a heading of 195°.

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 Sri Lanka. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 16:37 in Kathmandu, it's 16:22 in Colombo.

There is a significant elevation difference of 4,368 feet between the two airports. Colombo Int Arpt Ratmalana Airport sits lower than Tribhuvan International Airport.

The return flight from Colombo (RML) to Kathmandu (KTM) follows a heading of 13° (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 Tribhuvan International Airport (KTM) and Colombo Int Arpt Ratmalana Airport (RML) detail pages, or use our flight duration calculator to compare other routes.