The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to Guardiamarina Zanartu Airport (WPU) in Puerto Williams, Chile is 16,288 kilometers (10,121 miles / 8,795 nautical miles). The estimated flight time for this route is approximately 20h, flying south southwest at a heading of 208°.

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 Chile. 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 04:08 in Kathmandu, it's 18:23 in Puerto Williams. With a 9.75-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 4,302 feet between the two airports. Guardiamarina Zanartu Airport sits lower than Tribhuvan International Airport.

The return flight from Puerto Williams (WPU) to Kathmandu (KTM) follows a heading of 133° (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 Guardiamarina Zanartu Airport (WPU) detail pages, or use our flight duration calculator to compare other routes.