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

Return flights

20 Aug - 31 Aug	Air Busan
24 Aug - 31 Aug	Air China
02 Aug - 08 Aug	China Eastern
15 Aug - 19 Aug	EVA Air
08 Aug - 11 Aug	EVA Air
01 Aug - 01 Sep	EVA Air
24 Aug - 29 Aug	Air China
15 Aug - 18 Aug	EVA Air
16 Aug - 25 Aug	EVA Air
09 Aug - 12 Aug	EVA Air
27 Aug - 01 Sep	EVA Air
02 Aug - 05 Aug	EVA Air
30 Aug - 02 Sep	EVA Air
05 Aug - 01 Sep	EVA Air
29 Aug - 02 Sep	EVA Air
29 Aug - 04 Sep	EVA Air
27 Aug - 02 Sep	EVA Air
29 Aug - 05 Sep	EVA Air

Also check the deals for one-way flights from Seoul to Phnom-penh in August.

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 Phnom-penh

Cheap car rent in Phnom-penh

Cheapest return flights from Seoul to Phnom-penh in August from 363€

Return flights