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

Return flights

10 Sep - 19 Sep	Thai VietJet Air
16 Sep - 19 Sep	IndiGo
19 Sep - 27 Sep	SriLankan Airlines
23 Sep - 07 Oct	Air Arabia
03 Sep - 23 Sep	Air Arabia
06 Sep - 12 Sep	Thai Lion Air
01 Sep - 11 Sep	Air Arabia
04 Sep - 07 Sep	Air Arabia
10 Sep - 30 Sep	Air Arabia
15 Sep - 20 Sep	Air Arabia
10 Sep - 18 Sep	Air Arabia
10 Sep - 30 Oct	Air Arabia
03 Sep - 16 Oct	Air Arabia
22 Sep - 09 Oct	Air Arabia
03 Sep - 15 Oct	Air Arabia
16 Sep - 26 Oct	Air Arabia
23 Sep - 05 Oct	Air Arabia
26 Sep - 01 Oct	Air Arabia
26 Sep - 11 Oct	Air Arabia
18 Sep - 24 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 407€

Return flights