Kathmandu (KTM) to Siliguri (IXB): 196 miles (315 km) great-circle, about 0h 55m nonstop by our estimate. Cheapest fare observed: $367 round-trip on Air India, with 1 stop, departing May 20, 2026.
$367 round-trip, Air India AI214, departing 2026-05-20 at 10:05, returning 2026-05-30. The recorded itinerary left on a Wednesday, returning on a Saturday 10 nights later; the fare was observed 25 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $367, it ranked 5th of the 30 round-trip fares we recorded from KTM (median $659). That is 187.7 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: Paro (250 mi) at $536 and Bhairawa (120 mi) at $222.
Air India had the cheapest fare on 5 of 30 KTM routes. It is the 27th longest of the 30 routes we track from KTM.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Kathmandu, Asia/Kolkata; flight time is our estimate.