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

Return flights

13 Sep - 17 Sep	SWISS	direct
10 Sep - 11 Sep	SWISS	direct
15 Sep - 16 Sep	SWISS	direct
25 Sep - 30 Sep	SWISS	direct
30 Sep - 01 Oct	SWISS	direct
23 Sep - 30 Sep	SWISS	direct
15 Sep - 17 Sep	SWISS	direct
13 Sep - 16 Sep	SWISS	direct
16 Sep - 17 Sep	SWISS	direct
29 Sep - 02 Oct	KLM
29 Sep - 05 Oct	Aer Lingus
29 Sep - 06 Oct	KLM
29 Sep - 08 Oct	KLM
16 Sep - 30 Sep	SWISS	direct
11 Sep - 16 Sep	SWISS	direct
30 Sep - 05 Oct	SWISS	direct
30 Sep - 04 Oct	SWISS	direct
29 Sep - 02 Oct	SWISS	direct
29 Sep - 08 Oct	SWISS	direct
26 Sep - 01 Oct	SWISS	direct

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 173€

Return flights