AirHint found the following cheapest return flights from Zurich (ZRH) to Graz (GRZ) in September 2025 (see full year).

Return flights

13 Sep - 16 Sep	Pegasus Airlines
13 Sep - 15 Sep	Pegasus Airlines
15 Sep - 17 Sep	AJet
13 Sep - 20 Sep	Pegasus Airlines
29 Sep - 09 Oct	SWISS	direct
30 Sep - 10 Oct	Austrian Airlines
30 Sep - 09 Oct	SWISS	direct
14 Sep - 21 Sep	SunExpress
11 Sep - 15 Sep	Pegasus Airlines
17 Sep - 18 Sep	easyJet
11 Sep - 14 Sep	AJet
24 Sep - 30 Sep	easyJet
14 Sep - 16 Sep	SunExpress
30 Sep - 10 Oct	SWISS	direct
25 Sep - 07 Oct	Austrian Airlines	direct
28 Sep - 08 Oct	Lufthansa
29 Sep - 01 Oct	easyJet
29 Sep - 03 Oct	easyJet
30 Sep - 01 Oct	easyJet
30 Sep - 03 Oct	SWISS	direct

Also check the deals for one-way flights from Zurich to Graz 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 Zurich to Graz in September from 217€

Return flights