AirHint found the following cheapest return flights from Zagreb (ZAG) to Copenhagen (CPH) in September 2025 (see full year).

Return flights

19 Sep - 21 Sep	Ryanair
22 Sep - 29 Sep	Ryanair
18 Sep - 22 Sep	Ryanair
10 Sep - 17 Sep	Ryanair
18 Sep - 24 Sep	Ryanair
18 Sep - 21 Sep	Ryanair
21 Sep - 04 Oct	Croatia Airlines
29 Sep - 01 Oct	Ryanair
15 Sep - 18 Sep	Ryanair
02 Sep - 06 Sep	Ryanair
03 Sep - 06 Sep	Ryanair
08 Sep - 15 Sep	Ryanair
29 Sep - 05 Oct	Ryanair
21 Sep - 05 Oct	Ryanair
29 Sep - 01 Oct	Croatia Airlines	direct
29 Sep - 05 Oct	Croatia Airlines	direct

Also check the deals for one-way flights from Zagreb to Copenhagen in September.

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 Copenhagen in September from $167

Return flights