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

Return flights

06 Sep - 27 Sep	Turkmenistan Airlines
27 Sep - 05 Oct	Turkmenistan Airlines
20 Sep - 29 Oct	Pegasus Airlines
20 Sep - 24 Sep	Pegasus Airlines
21 Sep - 22 Sep	Pegasus Airlines
28 Sep - 04 Oct	Pegasus Airlines
21 Sep - 04 Oct	Pegasus Airlines
24 Sep - 27 Sep	Pegasus Airlines
07 Sep - 17 Sep	Oman Air
10 Sep - 25 Sep	Oman Air
08 Sep - 18 Sep	Oman Air
07 Sep - 18 Sep	Oman Air
21 Sep - 24 Sep	Pegasus Airlines
11 Sep - 22 Sep	Oman Air
18 Sep - 06 Oct	Oman Air
29 Sep - 06 Oct	Oman Air
27 Sep - 04 Oct	Pegasus Airlines
28 Sep - 05 Oct	Oman Air
10 Sep - 02 Oct	Oman Air
15 Sep - 15 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 $183

Return flights