AirHint found the following cheapest return flights from Milano (MXP) to Sofia (SOF) in December 2025 (see full year).

Return flights

05 Dec - 08 Dec	Air Serbia
07 Dec - 08 Dec	Air Serbia
08 Dec - 11 Dec	Air Serbia
11 Dec - 15 Dec	Air Serbia
06 Dec - 08 Dec	Air Serbia
04 Dec - 08 Dec	Air Serbia
26 Dec - 29 Dec	Air Serbia
31 Dec - 01 Jan	Air Serbia
26 Dec - 31 Dec	LOT
27 Dec - 30 Dec	LOT
27 Dec - 01 Jan	LOT
27 Dec - 05 Jan	Air Serbia
26 Dec - 28 Dec	LOT

Also check the deals for one-way flights from Milano to Sofia 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 Milano to Sofia in December from $168

Return flights