The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to San Antonio International Airport (SAT) in San Antonio, United States is 13,638 kilometers (8,474 miles / 7,364 nautical miles). The estimated flight time for this route is approximately 17h, flying north at a heading of 4°.

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

Time zone information: When it's 21:30 in Kathmandu, it's 09:45 in San Antonio. With a 11.75-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 3,581 feet between the two airports. San Antonio International Airport sits lower than Tribhuvan International Airport.

The return flight from San Antonio (SAT) to Kathmandu (KTM) follows a heading of 356° (north). 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 San Antonio International Airport (SAT) detail pages, or use our flight duration calculator to compare other routes.