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

Return flights

30 Sep - 02 Oct	SWISS	direct
30 Sep - 07 Oct	SWISS	direct
30 Sep - 01 Oct	SWISS	direct
07 Sep - 09 Sep	SWISS	direct
01 Sep - 03 Sep	SWISS	direct
09 Sep - 16 Sep	SWISS	direct
10 Sep - 17 Sep	SWISS	direct
14 Sep - 16 Sep	SWISS	direct
15 Sep - 17 Sep	SWISS	direct
03 Sep - 10 Sep	SWISS	direct
17 Sep - 24 Sep	SWISS	direct
04 Sep - 11 Sep	SWISS	direct
23 Sep - 30 Sep	SWISS	direct
24 Sep - 01 Oct	SWISS	direct
25 Sep - 02 Oct	SWISS	direct
30 Sep - 05 Oct	SWISS	direct
28 Sep - 03 Oct	KLM
29 Sep - 01 Oct	SWISS	direct
26 Sep - 01 Oct	SWISS	direct
29 Sep - 04 Oct	KLM

Also check the deals for one-way flights from Zurich to Oslo 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 Oslo in September from $193

Return flights