The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to Osvaldo Vieira International Airport (OXB) in Bissau, Guinea-Bissau is 10,452 kilometers (6,495 miles / 5,644 nautical miles). The estimated flight time for this route is approximately 13h, flying west northwest at a heading of 286°.

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 Guinea-Bissau. It is an intercontinental flight between Asia and Africa. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 14:19 in Kathmandu, it's 08:34 in Bissau. The 5.75-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

There is a significant elevation difference of 4,261 feet between the two airports. Osvaldo Vieira International Airport sits lower than Tribhuvan International Airport.

The return flight from Bissau (OXB) to Kathmandu (KTM) follows a heading of 61° (east 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 Osvaldo Vieira International Airport (OXB) detail pages, or use our flight duration calculator to compare other routes.