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

Return flights

11 Sep - 14 Sep	Ryanair
03 Sep - 06 Sep	Ryanair
03 Sep - 05 Sep	Ryanair
02 Sep - 08 Oct	Ryanair
03 Sep - 06 Sep	LOT	direct
19 Sep - 26 Sep	Lufthansa
12 Sep - 14 Sep	Lufthansa
12 Sep - 14 Sep	LOT	direct
02 Sep - 08 Oct	LOT	direct
19 Sep - 26 Sep	LOT	direct
11 Sep - 14 Sep	LOT	direct
03 Sep - 05 Sep	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 150€

Return flights