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

Return flights

19 Sep - 23 Sep	Cathay Pacific
21 Sep - 30 Sep	Air Astana
18 Sep - 23 Sep	Cathay Pacific
20 Sep - 22 Sep	Air China
19 Sep - 22 Sep	Cathay Pacific
18 Sep - 22 Sep	Cathay Pacific
20 Sep - 23 Sep	Air China
21 Sep - 26 Sep	Cathay Pacific
18 Sep - 30 Sep	Air Astana
25 Sep - 01 Oct	Shenzhen Airlines
24 Sep - 04 Oct	Air China
22 Sep - 29 Sep	Hainan Airlines
28 Sep - 01 Oct	Air China
28 Sep - 04 Oct	Air China
26 Sep - 03 Oct	Shenzhen Airlines
18 Sep - 08 Oct	Hainan Airlines
27 Sep - 09 Oct	Shenzhen Airlines
25 Sep - 03 Oct	Air China
29 Sep - 04 Oct	China Eastern
28 Sep - 07 Oct	Air China

Also check the deals for one-way flights from Beijing 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 Beijing to Istanbul in September from $608

Return flights