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

Return flights

26 Sep - 06 Oct	Lufthansa
24 Sep - 30 Sep	Lufthansa
30 Sep - 07 Oct	Lufthansa
26 Sep - 03 Oct	Lufthansa
30 Sep - 07 Oct	LOT	direct
24 Sep - 30 Sep	LOT	direct
11 Sep - 16 Sep	Lufthansa
25 Sep - 28 Sep	LOT	direct
26 Sep - 03 Oct	LOT	direct
27 Sep - 03 Oct	LOT	direct
26 Sep - 02 Oct	Lufthansa
03 Sep - 10 Sep	LOT	direct
12 Sep - 30 Sep	LOT	direct
11 Sep - 16 Sep	LOT	direct
12 Sep - 14 Sep	LOT	direct
20 Sep - 27 Sep	SWISS
20 Sep - 27 Sep	LOT	direct

Also check the deals for one-way flights from Ljubljana 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 Ljubljana to Warsaw in September from 186€

Return flights