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

Return flights

22 Sep - 07 Oct	IndiGo
30 Sep - 14 Oct	IndiGo
24 Sep - 01 Oct	Thai VietJet Air
30 Sep - 07 Oct	IndiGo
23 Sep - 07 Oct	Thai VietJet Air
25 Sep - 01 Oct	IndiGo
23 Sep - 30 Sep	Thai VietJet Air
25 Sep - 09 Oct	IndiGo
27 Sep - 08 Oct	IndiGo
24 Sep - 08 Oct	IndiGo
22 Sep - 01 Oct	Thai AirAsia
20 Sep - 24 Sep	Air India
22 Sep - 29 Sep	Thai AirAsia
17 Sep - 24 Sep	Thai AirAsia
22 Sep - 27 Sep	Gulf Air
21 Sep - 28 Sep	Thai Lion Air
19 Sep - 21 Sep	Air India
18 Sep - 25 Sep	Thai AirAsia
20 Sep - 27 Sep	Thai VietJet Air
21 Sep - 23 Sep	Condor

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 475€

Return flights