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

Return flights

15 Dec - 19 Dec	Ryanair
01 Dec - 05 Dec	Ryanair
05 Dec - 08 Dec	Ryanair
01 Dec - 04 Dec	Aegean Airlines
04 Dec - 07 Dec	Ryanair
11 Dec - 15 Dec	Ryanair
22 Dec - 28 Dec	Ryanair
05 Dec - 07 Dec	Aegean Airlines
17 Dec - 19 Dec	Ryanair
01 Dec - 03 Dec	Ryanair
30 Dec - 01 Jan	Ryanair
31 Dec - 02 Jan	Ryanair
30 Dec - 02 Jan	Ryanair
29 Dec - 02 Jan	Air Serbia
28 Dec - 02 Jan	Air Serbia
30 Dec - 04 Jan	Ryanair
27 Dec - 03 Jan	Lufthansa
29 Dec - 04 Jan	Air Serbia

Also check the deals for one-way flights from Zagreb 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 Zagreb to Sofia in December from 116€

Return flights