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

Return flights

18 Sep - 22 Oct	Ryanair
17 Sep - 21 Sep	Ryanair
24 Sep - 26 Sep	Ryanair
29 Sep - 01 Oct	Ryanair
22 Sep - 26 Sep	Ryanair
15 Sep - 20 Sep	Ryanair
16 Sep - 24 Sep	Ryanair
16 Sep - 17 Sep	Ryanair
11 Sep - 18 Sep	Ryanair
25 Sep - 28 Sep	Austrian Airlines
26 Sep - 30 Sep	Austrian Airlines
09 Sep - 11 Sep	Ryanair
29 Sep - 04 Oct	LOT	direct
18 Sep - 22 Oct	LOT	direct
29 Sep - 01 Oct	LOT	direct

Also check the deals for one-way flights from Zagreb to Warsaw 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 Warsaw in September from $190

Return flights