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

Return flights

21 Sep - 01 Oct	easyJet
22 Sep - 06 Oct	easyJet
05 Sep - 14 Sep	easyJet
27 Sep - 01 Oct	easyJet
07 Sep - 19 Sep	easyJet
29 Sep - 12 Oct	AJet
01 Sep - 16 Oct	easyJet
10 Sep - 17 Sep	easyJet
19 Sep - 24 Sep	easyJet
18 Sep - 02 Oct	easyJet
03 Sep - 10 Sep	easyJet
05 Sep - 10 Sep	easyJet
20 Sep - 02 Oct	easyJet
12 Sep - 17 Sep	KLM
12 Sep - 16 Sep	KLM
09 Sep - 14 Sep	easyJet
08 Sep - 17 Sep	easyJet
29 Sep - 14 Oct	easyJet
29 Sep - 02 Oct	easyJet
26 Sep - 10 Oct	easyJet

Also check the deals for one-way flights from Paris 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 Paris to Istanbul in September from $221

Return flights