The flight distance from St Helens Airport (HLS) in St Helens Airport, Australia to Tribhuvan International Airport (KTM) in Kathmandu, Nepal is 10,036 kilometers (6,236 miles / 5,419 nautical miles). The estimated flight time for this route is approximately 13h, flying northwest at a heading of 308°.

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

Time zone information: When it's 20:51 in St Helens Airport, it's 16:36 in Kathmandu. The 4.25-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

There is a significant elevation difference of 4,342 feet between the two airports. Tribhuvan International Airport sits higher than St Helens Airport.

The return flight from Kathmandu (KTM) to St Helens Airport (HLS) follows a heading of 138° (southeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the St Helens Airport (HLS) and Tribhuvan International Airport (KTM) detail pages, or use our flight duration calculator to compare other routes.