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

Return flights

25 Aug - 07 Sep	Lufthansa
18 Aug - 03 Sep	Lufthansa
26 Aug - 04 Sep	Lufthansa
17 Aug - 01 Sep	Lufthansa
18 Aug - 02 Sep	Lufthansa
25 Aug - 31 Aug	Lufthansa
18 Aug - 26 Aug	Lufthansa
19 Aug - 26 Aug	Lufthansa
28 Aug - 04 Sep	Emirates
26 Aug - 09 Sep	Emirates
27 Aug - 08 Sep	Emirates
24 Aug - 07 Sep	Lufthansa
26 Aug - 08 Sep	Emirates
12 Aug - 19 Aug	China Eastern
12 Aug - 31 Aug	Lufthansa
24 Aug - 31 Aug	Emirates
28 Aug - 31 Aug	Emirates
25 Aug - 28 Aug	Lufthansa
12 Aug - 28 Aug	Lufthansa
20 Aug - 27 Aug	Turkish Airlines

Also check the deals for one-way flights from Seoul to Oslo 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 Seoul to Oslo in August from $679

Return flights