AirHint found the following cheapest return flights from Kathmandu (KTM) to Madrid (MAD) in December 2025 (see full year).
Return flights
| 15 Dec - 14 Jan | IndiGo | ||
| 02 Dec - 15 Dec | Nepal Airlines | ||
| 02 Dec - 06 Dec | IndiGo | ||
| 06 Dec - 06 Jan | Air Arabia |
Also check the deals for one-way flights from Kathmandu to Madrid in December.
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