AirHint found the following cheapest one-way flights from Boston (BOS) to Kathmandu (KTM) in December 2025 (see full year).
One-Way flights
| 30 Dec | IndiGo | ||
| 08 Dec | IndiGo | ||
| 12 Dec | TAP | ||
| 14 Dec | ITA Airways | ||
| 09 Dec | IndiGo | ||
| 19 Dec | KLM |
Also check the deals for return flights from Boston to Kathmandu in December.
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