The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to Antoine De St Exupery Airport (OES) in San Antonio Oeste, Argentina is 16,951 kilometers (10,533 miles / 9,153 nautical miles). The estimated flight time for this route is approximately 21h, flying southwest at a heading of 234°.

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 Argentina. It is an intercontinental flight between Asia and South America. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 09:18 in Kathmandu, it's 00:33 in San Antonio Oeste. With a 8.75-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

There is a significant elevation difference of 4,305 feet between the two airports. Antoine De St Exupery Airport sits lower than Tribhuvan International Airport.

The return flight from San Antonio Oeste (OES) to Kathmandu (KTM) follows a heading of 109° (east 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 Tribhuvan International Airport (KTM) and Antoine De St Exupery Airport (OES) detail pages, or use our flight duration calculator to compare other routes.