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

Return flights

31 Dec - 17 Jan	Ryanair
31 Dec - 11 Jan	Ryanair
31 Dec - 10 Jan	Ryanair
31 Dec - 05 Jan	Ryanair
30 Dec - 10 Jan	Ryanair
18 Dec - 06 Jan	Ryanair
30 Dec - 11 Jan	Ryanair
31 Dec - 04 Jan	Ryanair
29 Dec - 09 Jan	Ryanair
23 Dec - 30 Dec	Ryanair
12 Dec - 19 Dec	Ryanair
23 Dec - 03 Jan	Ryanair
19 Dec - 22 Dec	Ryanair
12 Dec - 14 Dec	Ryanair
24 Dec - 30 Dec	Ryanair
15 Dec - 22 Dec	Ryanair
10 Dec - 15 Dec	Turkish Airlines
27 Dec - 30 Dec	Ryanair
26 Dec - 30 Dec	Ryanair
25 Dec - 29 Dec	LOT

Also check the deals for one-way flights from Zagreb to Helsinki 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 Helsinki in December from $118

Return flights