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

Return flights

10 Dec - 17 Dec	Vueling Airlines
04 Dec - 08 Dec	Vueling Airlines
04 Dec - 22 Dec	Vueling Airlines
04 Dec - 21 Dec	Vueling Airlines
04 Dec - 07 Dec	Air Serbia
03 Dec - 21 Dec	Air Serbia
01 Dec - 07 Dec	Vueling Airlines
06 Dec - 08 Dec	Air Serbia
12 Dec - 15 Dec	Air Serbia
01 Dec - 04 Dec	Vueling Airlines
14 Dec - 05 Jan	Air Serbia
15 Dec - 02 Jan	easyJet
13 Dec - 05 Jan	Vueling Airlines
30 Dec - 05 Jan	Condor
17 Dec - 02 Jan	easyJet
28 Dec - 06 Jan	Air Serbia
31 Dec - 06 Jan	easyJet
26 Dec - 08 Jan	Air Serbia
28 Dec - 11 Jan	Air Serbia
18 Dec - 05 Jan	SWISS

Also check the deals for one-way flights from Zurich 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 Zurich to Sofia in December from $161

Return flights