AirHint found the following cheapest return flights from Istanbul (SAW) to Seoul (ICN) in September 2025 (see full year).

Return flights

01 Sep - 10 Sep	flyadeal
14 Sep - 20 Sep	Pegasus Airlines
06 Sep - 12 Sep	flyadeal
08 Sep - 23 Sep	Pegasus Airlines
07 Sep - 19 Sep	Qatar Airways
02 Sep - 11 Sep	flyadeal
06 Sep - 13 Sep	Flynas
11 Sep - 17 Sep	Air Arabia
25 Sep - 12 Oct	AJet
10 Sep - 15 Sep	Pegasus Airlines
03 Sep - 09 Sep	Flynas
25 Sep - 10 Oct	Qatar Airways
26 Sep - 03 Oct	Pegasus Airlines
30 Sep - 28 Oct	Qatar Airways
08 Sep - 23 Oct	Qatar Airways
03 Sep - 21 Oct	Qatar Airways
02 Sep - 23 Oct	Qatar Airways
29 Sep - 08 Oct	Qatar Airways
29 Sep - 13 Oct	Qatar Airways
23 Sep - 12 Oct	KLM

Also check the deals for one-way flights from Istanbul to Seoul 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 Seoul in September from 519€

Return flights