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

Return flights

20 Sep - 01 Oct	Eurowings
22 Sep - 24 Sep	Eurowings
21 Sep - 01 Oct	Eurowings
23 Sep - 24 Sep	Eurowings
23 Sep - 27 Sep	Lufthansa
25 Sep - 29 Sep	Wizz Air
22 Sep - 29 Sep	KLM
19 Sep - 22 Sep	Lufthansa
20 Sep - 02 Oct	Lufthansa
21 Sep - 24 Sep	Eurowings
15 Sep - 19 Sep	Wizz Air
26 Sep - 28 Sep	Eurowings
20 Sep - 28 Sep	KLM
28 Sep - 02 Oct	LOT	direct
21 Sep - 01 Oct	LOT	direct
26 Sep - 12 Oct	Eurowings
20 Sep - 02 Oct	LOT	direct
20 Sep - 01 Oct	LOT	direct
30 Sep - 02 Oct	Eurowings
29 Sep - 02 Oct	LOT

Also check the deals for one-way flights from Stuttgart 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 Stuttgart to Warsaw in September from 171€

Return flights