AirHint found the following cheapest return flights from Phnom-penh (PNH) to Seoul (ICN) in September 2025 (see full year).

Return flights

07 Sep - 11 Sep	Thai AirAsia
07 Sep - 08 Sep	Thai AirAsia
02 Sep - 11 Sep	Thai AirAsia
02 Sep - 03 Sep	Thai AirAsia
02 Sep - 08 Sep	Thai AirAsia
12 Sep - 19 Sep	Vietnam Airlines
19 Sep - 25 Sep	Vietnam Airlines
21 Sep - 24 Sep	Vietnam Airlines
20 Sep - 22 Sep	Vietnam Airlines
02 Sep - 05 Sep	Thai AirAsia
25 Sep - 16 Oct	Thai AirAsia
25 Sep - 11 Oct	Thai AirAsia
21 Sep - 11 Oct	Thai AirAsia
25 Sep - 10 Oct	Thai AirAsia
21 Sep - 10 Oct	Thai AirAsia
30 Sep - 16 Oct	Thai AirAsia
30 Sep - 10 Oct	Thai AirAsia
20 Sep - 11 Oct	Thai AirAsia
20 Sep - 10 Oct	Thai AirAsia
30 Sep - 17 Oct	Thai AirAsia

Also check the deals for one-way flights from Phnom-penh 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 Phnom-penh to Seoul in September from $329

Return flights