The flight distance from RAF Ascension Island (ASI) in Ascension Island, SH to Tribhuvan International Airport (KTM) in Kathmandu, Nepal is 11,375 kilometers (7,068 miles / 6,142 nautical miles). The estimated flight time for this route is approximately 14h, flying east northeast at a heading of 63°.

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 SH with Nepal. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 08:21 in Ascension Island, it's 14:06 in Kathmandu. The 5.75-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

There is a significant elevation difference of 4,112 feet between the two airports. Tribhuvan International Airport sits higher than RAF Ascension Island.

The return flight from Kathmandu (KTM) to Ascension Island (ASI) follows a heading of 267° (west). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

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