AirHint found the following cheapest one-way flights from Oslo (OSL) to Kristiansand (KRS) in September 2025 (see full year).

One-Way flights

30 Sep	Scandinavian Airlines	direct
12 Sep	Scandinavian Airlines	direct
03 Sep	Scandinavian Airlines	direct
05 Sep	Scandinavian Airlines	direct
04 Sep	Scandinavian Airlines	direct
13 Sep	Scandinavian Airlines	direct
29 Sep	Scandinavian Airlines	direct
22 Sep	Scandinavian Airlines	direct
09 Sep	Scandinavian Airlines	direct
10 Sep	Scandinavian Airlines	direct

Also check the deals for return flights from Oslo to Kristiansand 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 one-way flights from Oslo to Kristiansand in September from $45

One-Way flights