The flight distance from Tribhuvan International Airport (KTM) in Kathmandu, Nepal to Francisco de Sa Carneiro Airport (OPO) in Porto, Portugal is 8,335 kilometers (5,179 miles / 4,500 nautical miles). The estimated flight time for this route is approximately 11h, flying northwest at a heading of 309°.

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

This is an international route connecting Nepal with Portugal. It is an intercontinental flight between Asia and Europe. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 23:02 in Kathmandu, it's 17:17 in Porto. 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 4,162 feet between the two airports. Francisco de Sa Carneiro Airport sits lower than Tribhuvan International Airport.

The return flight from Porto (OPO) to Kathmandu (KTM) follows a heading of 66° (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 Francisco de Sa Carneiro Airport (OPO) detail pages, or use our flight duration calculator to compare other routes.