AirHint found the following cheapest return flights from Ulaanbaatar (UBN) to Athens (ATH) in December 2025 (see full year).
Return flights
| 21 Dec - 01 Jan | MIAT Mongolian Airlines | ||
| 27 Dec - 04 Jan | Turkish Airlines | ||
| 20 Dec - 30 Dec | MIAT Mongolian Airlines |
Also check the deals for one-way flights from Ulaanbaatar to Athens in December.
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