AirHint found the following cheapest return flights from Frankfurt (FRA) to Ulaanbaatar (UBN) in December 2025 (see full year).

Return flights

10 Dec - 21 Dec	MIAT Mongolian Airlines	direct
01 Dec - 12 Dec	Turkish Airlines
28 Dec - 05 Jan	MIAT Mongolian Airlines	direct
24 Dec - 29 Dec	MIAT Mongolian Airlines	direct
23 Dec - 28 Dec	Ryanair
25 Dec - 02 Jan	LOT

Also check the deals for one-way flights from Frankfurt to Ulaanbaatar in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Frankfurt to Ulaanbaatar in December from $764

Return flights