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

Return flights

25 Sep - 02 Oct	Ryanair
15 Sep - 28 Sep	Ryanair
02 Sep - 23 Sep	Pegasus Airlines
01 Sep - 09 Sep	Pegasus Airlines
01 Sep - 16 Sep	Pegasus Airlines
02 Sep - 16 Sep	Pegasus Airlines
20 Sep - 29 Sep	Ryanair
11 Sep - 25 Sep	Pegasus Airlines
14 Sep - 22 Sep	Pegasus Airlines
04 Sep - 22 Sep	Pegasus Airlines
17 Sep - 22 Sep	Ryanair
21 Sep - 07 Oct	Lufthansa
18 Sep - 01 Oct	Lufthansa
22 Sep - 05 Oct	KLM
20 Sep - 05 Oct	Lufthansa
25 Sep - 22 Oct	Lufthansa
27 Sep - 11 Oct	Air France
25 Sep - 20 Oct	Lufthansa

Also check the deals for one-way flights from Zagreb to Bangkok 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 Zagreb to Bangkok in September from 545€

Return flights