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

Return flights

15 Sep - 29 Sep	SWISS
17 Sep - 26 Sep	IndiGo
20 Sep - 29 Sep	Air India
22 Sep - 30 Sep	IndiGo
23 Sep - 30 Sep	IndiGo
13 Sep - 19 Sep	IndiGo
10 Sep - 17 Sep	IndiGo
09 Sep - 18 Sep	IndiGo
13 Sep - 20 Sep	IndiGo
10 Sep - 19 Sep	IndiGo
30 Sep - 12 Oct	Air India
24 Sep - 29 Oct	Etihad Airways
17 Sep - 16 Oct	Etihad Airways
18 Sep - 02 Oct	Etihad Airways
27 Sep - 10 Oct	Etihad Airways
30 Sep - 12 Oct	SWISS	direct
26 Sep - 03 Oct	Etihad Airways
23 Sep - 07 Oct	IndiGo
29 Sep - 06 Oct	IndiGo
24 Sep - 23 Oct	IndiGo

Also check the deals for one-way flights from Bangkok 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 Bangkok to Zurich in September from $608

Return flights