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

Return flights

16 Sep - 23 Sep	IndiGo
22 Sep - 29 Sep	IndiGo
24 Sep - 30 Sep	IndiGo
19 Sep - 26 Sep	IndiGo
10 Sep - 19 Sep	IndiGo
05 Sep - 15 Sep	Etihad Airways
28 Sep - 08 Oct	Etihad Airways
24 Sep - 01 Oct	Emirates
25 Sep - 06 Oct	IndiGo
27 Sep - 07 Oct	Air India
27 Sep - 04 Oct	Air India
27 Sep - 05 Oct	Air India

Also check the deals for one-way flights from Kolkata 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 Kolkata to Zurich in September from $612

Return flights