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

Return flights

21 Sep - 29 Oct	Pegasus Airlines
28 Sep - 06 Oct	Pegasus Airlines
13 Sep - 13 Oct	Oman Air
27 Sep - 07 Oct	Pegasus Airlines
29 Sep - 06 Oct	Pegasus Airlines
02 Sep - 10 Sep	Oman Air
03 Sep - 11 Sep	Oman Air
10 Sep - 18 Sep	Oman Air
17 Sep - 24 Sep	Oman Air
16 Sep - 28 Sep	Oman Air
01 Sep - 20 Sep	Oman Air
14 Sep - 25 Sep	Oman Air
13 Sep - 26 Sep	Oman Air
04 Sep - 12 Sep	Oman Air
02 Sep - 12 Sep	Oman Air
17 Sep - 17 Oct	Oman Air
26 Sep - 10 Oct	Oman Air
20 Sep - 04 Oct	Oman Air
24 Sep - 23 Oct	Oman Air
26 Sep - 12 Oct	Oman Air

Also check the deals for one-way flights from Istanbul 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 Istanbul to Bangkok in September from 329€

Return flights