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

Return flights

25 Sep - 08 Oct	MIAT Mongolian Airlines
12 Sep - 21 Sep	Flynas
13 Sep - 21 Sep	Flynas
11 Sep - 20 Sep	MIAT Mongolian Airlines
15 Sep - 21 Sep	Flynas
28 Sep - 30 Oct	MIAT Mongolian Airlines
10 Sep - 15 Sep	flyadeal
19 Sep - 05 Oct	Flynas
22 Sep - 06 Oct	flyadeal
13 Sep - 18 Sep	Flynas
08 Sep - 15 Sep	Flynas
15 Sep - 22 Sep	Flynas
12 Sep - 20 Sep	Flynas
25 Sep - 04 Oct	flyadeal
07 Sep - 12 Oct	MIAT Mongolian Airlines
15 Sep - 24 Sep	Flynas
28 Sep - 04 Oct	MIAT Mongolian Airlines
29 Sep - 03 Oct	flyadeal
22 Sep - 07 Oct	Air Astana
27 Sep - 10 Oct	Flynas

Also check the deals for one-way flights from Istanbul to Beijing 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 Beijing in September from $538

Return flights