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

Return flights

03 Dec - 05 Dec	Ryanair
12 Dec - 15 Dec	Ryanair
03 Dec - 12 Dec	Ryanair
03 Dec - 07 Dec	Ryanair
10 Dec - 12 Dec	Ryanair
18 Dec - 22 Dec	Ryanair
08 Dec - 15 Dec	KLM
19 Dec - 22 Dec	Ryanair
31 Dec - 06 Jan	Ryanair
16 Dec - 17 Dec	LOT
24 Dec - 28 Dec	Ryanair
24 Dec - 03 Jan	Croatia Airlines
29 Dec - 09 Jan	KLM
22 Dec - 03 Jan	Croatia Airlines
30 Dec - 02 Jan	Ryanair
27 Dec - 03 Jan	Ryanair

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 $171

Return flights