Kathmandu (KTM) to Nha Trang (NHA): 1,886 miles (3,035 km) great-circle, about 4h 15m nonstop by our estimate. Cheapest fare observed: $789 round-trip on Air India, with 2 stops, departing May 8, 2026.
$789 round-trip, Air India AI214, departing 2026-05-08 at 10:05, returning 2026-05-10. The recorded itinerary left on a Friday, returning on a Sunday 2 nights later; the fare was observed 13 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $789, it ranked 19th of the 30 round-trip fares we recorded from KTM (median $659). That is 41.8 cents per great-circle mile (round-trip price over one-way distance), above the KTM median of 37.6 cents across 28 round-trip routes.
Routes from KTM of similar length: Novosibirsk (1,893 mi) at $1344 and Irkutsk (1,961 mi) at $1021.
Air India had the cheapest fare on 5 of 30 KTM routes. It is the 15th longest of the 30 routes we track from KTM.
Of 17 departure airports with a fare to Nha Trang, Kathmandu (KTM) ranked 17th at $789. Lowest: $109 from Ho Chi Minh City (SGN); highest: $789 from Kathmandu (KTM); 7 nonstop. Cheapest-fare airlines (routes): VietJet Air (4), AirAsia (2), Sichuan Airlines (2), Thai Vietjet Air (2), Vietnam Airlines (2) and Air India (1), plus 4 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Kathmandu, Asia/Ho_Chi_Minh; flight time is our estimate.