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

Return flights

28 Aug - 10 Sep	Hainan Airlines
21 Aug - 03 Sep	Hainan Airlines
31 Aug - 07 Sep	Norwegian
01 Aug - 19 Aug	Scandinavian Airlines
05 Aug - 19 Aug	Hainan Airlines
03 Aug - 17 Aug	Norwegian Air Sweden AOC
29 Aug - 07 Sep	Iberia
20 Aug - 31 Aug	Norwegian
12 Aug - 26 Aug	Lufthansa
27 Aug - 29 Sep	ANA
01 Aug - 20 Aug	Ryanair
10 Aug - 24 Aug	Norwegian
23 Aug - 30 Aug	Japan Airlines
04 Aug - 19 Aug	Norwegian Air Sweden AOC
27 Aug - 27 Sep	Japan Airlines
27 Aug - 28 Sep	Japan Airlines
27 Aug - 30 Sep	Japan Airlines

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 $975

Return flights