AirHint found the following cheapest return flights from Hanoi (HAN) to Kathmandu (KTM) in December 2025 (see full year).
Return flights
| 21 Dec - 26 Dec | Thai AirAsia | ||
| 30 Dec - 06 Jan | Thai AirAsia | ||
| 27 Dec - 04 Jan | VietJet Air | ||
| 31 Dec - 11 Jan | IndiGo | ||
| 26 Dec - 04 Jan | China Southern |
Also check the deals for one-way flights from Hanoi to Kathmandu in December.
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