The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to Key West Nas (Boca Chica Field) Airport (NQX) in Key West, United States is 14,040 kilometers (8,724 miles / 7,581 nautical miles). The estimated flight time for this route is approximately 18h, flying north northwest at a heading of 345°.

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 04:00 in Kathmandu, it's 18:15 in Key West. 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 4,384 feet between the two airports. Key West Nas (Boca Chica Field) Airport sits lower than Tribhuvan International Airport.

The return flight from Key West (NQX) to Kathmandu (KTM) follows a heading of 14° (north northeast). 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 Key West Nas (Boca Chica Field) Airport (NQX) detail pages, or use our flight duration calculator to compare other routes.