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

Return flights

24 Sep - 30 Sep	Air France
17 Sep - 23 Sep	Scandinavian Airlines
29 Sep - 17 Oct	China Eastern
25 Sep - 02 Oct	Air France
21 Sep - 25 Sep	Jeju Air
25 Sep - 01 Oct	Air France
29 Sep - 11 Oct	China Eastern
19 Sep - 25 Sep	Thai Airways
21 Sep - 30 Sep	Thai Airways
19 Sep - 21 Sep	Finnair
18 Sep - 26 Sep	Thai Airways
20 Sep - 30 Sep	Scandinavian Airlines
29 Sep - 16 Oct	Thai Airways
24 Sep - 26 Sep	Air France
29 Sep - 06 Oct	Thai Airways
26 Sep - 06 Oct	Air France
23 Sep - 07 Oct	Air France
30 Sep - 08 Oct	Etihad Airways
29 Sep - 15 Oct	Emirates

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

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 September from $817

Return flights