The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to Necochea Airport (NEC) in Necochea, Argentina is 16,496 kilometers (10,250 miles / 8,907 nautical miles). The estimated flight time for this route is approximately 20h, flying west southwest at a heading of 241°.

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 04:34 in Kathmandu, it's 19:49 in Necochea. 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 4,318 feet between the two airports. Necochea Airport sits lower than Tribhuvan International Airport.

The return flight from Necochea (NEC) to Kathmandu (KTM) follows a heading of 99° (east). 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 Necochea Airport (NEC) detail pages, or use our flight duration calculator to compare other routes.