Kathmandu (KTM) to Bangkok (BKK): 1,385 miles (2,230 km) great-circle, about 3h 15m nonstop by our estimate. Cheapest fare observed: $434 round-trip on Air India, with 1 stop, departing May 8, 2026.
$434 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 $434, it ranked 7th of the 30 round-trip fares we recorded from KTM (median $659). That is 31.3 cents per great-circle mile (round-trip price over one-way distance), below the KTM median of 37.6 cents across 28 round-trip routes.
Routes from KTM of similar length: Colombo (1,462 mi) at $513 and Almaty (1,177 mi) at $686.
Air India had the cheapest fare on 5 of 30 KTM routes. It is the 18th longest of the 30 routes we track from KTM.
Of 59 departure airports with a fare to Bangkok, Kathmandu (KTM) ranked 26th at $434. Lowest: $73 from Phuket (HKT); highest: $1428 from Mexico City (MEX); 14 nonstop. Cheapest-fare airlines (routes): Air India (5), Etihad (5), Thai Vietjet Air (4), Air China (3), Scoot (3) and Thai AirAsia (3), plus 31 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Kathmandu, Asia/Bangkok; flight time is our estimate.