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

Return flights

18 Sep - 21 Sep	VietJet Air
16 Sep - 21 Sep	VietJet Air
10 Sep - 15 Sep	Air Arabia
02 Sep - 28 Sep	Air Arabia
17 Sep - 24 Sep	IndiGo
17 Sep - 22 Sep	IndiGo
05 Sep - 10 Sep	Air Arabia
19 Sep - 26 Sep	IndiGo
10 Sep - 20 Sep	IndiGo
13 Sep - 21 Sep	IndiGo
29 Sep - 08 Oct	IndiGo
24 Sep - 10 Oct	Oman Air
10 Sep - 10 Oct	Oman Air
02 Sep - 21 Oct	Air Arabia
24 Sep - 03 Oct	Air Arabia
09 Sep - 26 Oct	Air Arabia
26 Sep - 05 Oct	Air Arabia
27 Sep - 05 Oct	Air Arabia
27 Sep - 10 Oct	Air Arabia
06 Sep - 31 Oct	Air Arabia

Also check the deals for one-way flights from Bangkok to Istanbul 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 Istanbul in September from $492

Return flights