AirHint found the following cheapest return flights from Seoul (ICN) to Oslo (OSL) in September 2026 (see full year).

Return flights

02 Sep - 16 Sep	Lufthansa
01 Sep - 08 Sep	Lufthansa
08 Sep - 15 Sep	Lufthansa
01 Sep - 15 Sep	Scandinavian Airlines
28 Sep - 06 Oct	Finnair
22 Sep - 29 Sep	Thai Airways
25 Sep - 09 Oct	Thai Airways
18 Sep - 02 Oct	Thai Airways
24 Sep - 06 Oct	Thai Airways
26 Sep - 29 Sep	Korean Air
24 Sep - 27 Sep	LOT
25 Sep - 27 Sep	LOT

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 $612

Return flights