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

Return flights

18 Sep - 19 Sep	Austrian Airlines
11 Sep - 12 Sep	Austrian Airlines
18 Sep - 22 Sep	SWISS	direct
17 Sep - 23 Sep	SWISS	direct
29 Sep - 06 Oct	SWISS	direct
12 Sep - 22 Sep	Austrian Airlines	direct
12 Sep - 15 Sep	Austrian Airlines	direct
16 Sep - 18 Sep	Austrian Airlines
15 Sep - 17 Sep	Austrian Airlines
10 Sep - 12 Sep	Austrian Airlines
09 Sep - 10 Sep	Pegasus Airlines
28 Sep - 05 Oct	Lufthansa

Also check the deals for one-way flights from Graz to Zurich 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.

Book a cheap hotel in Zurich

Cheap car rent in Zurich

Cheapest return flights from Graz to Zurich in September from 195€

Return flights