AirHint found the following cheapest return flights from Columbus (CMH) to Kathmandu (KTM) in December 2025 (see full year).
Return flights
| 05 Dec - 26 Dec | Korean Air | ||
| 30 Dec - 06 Jan | Spirit Airlines | ||
| 09 Dec - 07 Jan | Alaska Airlines |
Also check the deals for one-way flights from Columbus to Kathmandu in December.
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