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

Return flights

03 Oct - 06 Oct	Ryanair
02 Oct - 05 Oct	Ryanair
29 Oct - 02 Nov	Ryanair
09 Oct - 18 Oct	KLM
31 Oct - 07 Nov	KLM
24 Oct - 31 Oct	Ryanair
13 Oct - 18 Oct	KLM
25 Oct - 31 Oct	Ryanair
24 Oct - 01 Nov	Ryanair
06 Oct - 09 Oct	Ryanair
01 Oct - 04 Oct	Ryanair
04 Oct - 07 Oct	Ryanair
13 Oct - 16 Oct	Ryanair

Also check the deals for one-way flights from Zagreb to Helsinki in October.

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 October from $179

Return flights