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

Return flights

24 Sep - 08 Oct	Qatar Airways
25 Sep - 08 Oct	Qatar Airways
23 Sep - 30 Sep	Turkish Airlines
28 Sep - 07 Oct	Turkish Airlines
24 Sep - 01 Oct	KLM
21 Sep - 05 Oct	Turkish Airlines
27 Sep - 11 Oct	IndiGo
26 Sep - 06 Oct	Turkish Airlines
19 Sep - 30 Sep	Air India
26 Sep - 29 Sep	Air India
28 Sep - 08 Oct	Emirates
20 Sep - 30 Sep	Emirates
20 Sep - 27 Sep	Air India
25 Sep - 29 Sep	Qatar Airways
24 Sep - 26 Sep	Etihad Airways
23 Sep - 27 Sep	Finnair
21 Sep - 05 Oct	SWISS	direct
19 Sep - 30 Sep	Singapore Airlines	direct
25 Sep - 29 Sep	Singapore Airlines	direct
26 Sep - 06 Oct	SWISS	direct

Also check the deals for one-way flights from Singapore 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.

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Cheapest return flights from Singapore to Zurich in September from $617

Return flights