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

Return flights

22 Sep - 08 Oct	Air Arabia Abu Dhabi
20 Sep - 24 Sep	Air Arabia
10 Sep - 22 Sep	Air Arabia
09 Sep - 22 Sep	Air Arabia
22 Sep - 28 Sep	Air Arabia
07 Sep - 16 Sep	Air Arabia
07 Sep - 17 Sep	Air Arabia
16 Sep - 24 Sep	Etihad Airways
10 Sep - 20 Sep	Air Arabia
10 Sep - 12 Sep	Air Arabia
06 Sep - 17 Sep	Air Arabia
22 Sep - 08 Oct	Turkish Airlines	direct
30 Sep - 07 Oct	Turkish Airlines	direct

Also check the deals for one-way flights from Colombo 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 Colombo to Istanbul in September from $418

Return flights