AirHint found the following cheapest return flights from Istanbul (IST) to Phnom-penh (PNH) in September 2025 (see full year).

Return flights

01 Sep - 10 Sep	IndiGo
01 Sep - 06 Sep	Etihad Airways
03 Sep - 21 Sep	Pegasus Airlines
18 Sep - 25 Sep	AJet
02 Sep - 23 Sep	flyadeal
01 Sep - 24 Sep	Etihad Airways
15 Sep - 21 Sep	Pegasus Airlines
08 Sep - 14 Sep	IndiGo
02 Sep - 17 Sep	Etihad Airways
05 Sep - 25 Sep	Pegasus Airlines

Also check the deals for one-way flights from Istanbul to Phnom-penh 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 Phnom-penh in September from 583€

Return flights