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
01 Sep - 15 Sep	Scandinavian Airlines
25 Sep - 27 Sep	Vietnam Airlines
23 Sep - 28 Sep	Air France
24 Sep - 11 Oct	Thai Airways
24 Sep - 08 Oct	Thai Airways
19 Sep - 26 Sep	Thai Airways
25 Sep - 09 Oct	Thai Airways
18 Sep - 02 Oct	Thai Airways
18 Sep - 25 Sep	Thai Airways
26 Sep - 29 Sep	Korean Air
24 Sep - 27 Sep	LOT
18 Sep - 01 Oct	Scandinavian Airlines
18 Sep - 27 Sep	Scandinavian Airlines

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 528€

Return flights