The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to George F. L. Charles Airport (SLU) in Castries, Saint Lucia is 14,127 kilometers (8,778 miles / 7,628 nautical miles). The estimated flight time for this route is approximately 18h, flying northwest at a heading of 318°.

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 Saint Lucia. 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 20:44 in Kathmandu, it's 10:59 in Castries. 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 4,368 feet between the two airports. George F. L. Charles Airport sits lower than Tribhuvan International Airport.

The return flight from Castries (SLU) to Kathmandu (KTM) follows a heading of 38° (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 George F. L. Charles Airport (SLU) detail pages, or use our flight duration calculator to compare other routes.