AirHint found the following cheapest return flights from Oslo (OSL) to Seoul (ICN) in August 2025 (see full year).

Return flights

27 Aug - 03 Sep	Norwegian
26 Aug - 23 Sep	Hainan Airlines
19 Aug - 26 Aug	Scandinavian Airlines
24 Aug - 31 Aug	Norwegian Air Sweden AOC
29 Aug - 06 Sep	Norwegian Air Sweden AOC
29 Aug - 07 Sep	Norwegian
17 Aug - 21 Aug	Norwegian Air Sweden AOC
24 Aug - 30 Sep	Etihad Airways
06 Aug - 20 Aug	Norwegian
10 Aug - 23 Aug	Norwegian
03 Aug - 17 Aug	Scandinavian Airlines
05 Aug - 12 Aug	airBaltic
03 Aug - 10 Aug	Scandinavian Airlines
04 Aug - 10 Aug	Norwegian
03 Aug - 12 Aug	Finnair

Also check the deals for one-way flights from Oslo to Seoul 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.

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Cheapest return flights from Oslo to Seoul in August from $715

Return flights