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

Return flights

19 Sep - 28 Oct	Pegasus Airlines
27 Sep - 30 Oct	Pegasus Airlines
26 Sep - 13 Oct	Pegasus Airlines
28 Sep - 14 Oct	Pegasus Airlines
18 Sep - 28 Oct	AJet
18 Sep - 30 Oct	AJet
27 Sep - 13 Oct	Pegasus Airlines
21 Sep - 22 Oct	Air Arabia Abu Dhabi
22 Sep - 14 Oct	Pegasus Airlines
30 Sep - 12 Oct	flyadeal
20 Sep - 24 Sep	Pegasus Airlines
18 Sep - 22 Sep	AJet
15 Sep - 22 Sep	Flynas
16 Sep - 25 Sep	Pegasus Airlines
18 Sep - 25 Sep	AJet
17 Sep - 24 Sep	Pegasus Airlines
22 Sep - 29 Sep	Pegasus Airlines
15 Sep - 23 Sep	Flynas
16 Sep - 20 Sep	Pegasus Airlines
17 Sep - 20 Sep	Pegasus Airlines

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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Istanbul to Seoul in September from 514€

Return flights