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

Return flights

22 Aug - 29 Aug	Norwegian
21 Aug - 03 Sep	Finnair
04 Aug - 13 Aug	Norwegian Air Sweden AOC
26 Aug - 31 Aug	Hainan Airlines
15 Aug - 23 Aug	Scandinavian Airlines
10 Aug - 24 Aug	Scandinavian Airlines
04 Aug - 10 Aug	Norwegian Air Sweden AOC

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 670€

Return flights