The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to Smithton Airport (SIO) in Smithton Airport, Australia is 9,792 kilometers (6,085 miles / 5,287 nautical miles). The estimated flight time for this route is approximately 13h, flying southeast at a heading of 139°.

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 Nepal with Australia. It is an intercontinental flight between Asia and Oceania. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 02:53 in Kathmandu, it's 08:08 in Smithton Airport. The 5.25-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

There is a significant elevation difference of 4,359 feet between the two airports. Smithton Airport sits lower than Tribhuvan International Airport.

The return flight from Smithton Airport (SIO) to Kathmandu (KTM) follows a heading of 310° (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 Smithton Airport (SIO) detail pages, or use our flight duration calculator to compare other routes.