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

Return flights

25 Sep - 28 Sep	Ryanair
24 Sep - 28 Sep	Ryanair
23 Sep - 30 Sep	Ryanair
24 Sep - 26 Sep	Ryanair
30 Sep - 07 Oct	Ryanair
25 Sep - 02 Oct	Ryanair
29 Sep - 07 Oct	Ryanair
30 Sep - 01 Oct	airBaltic
20 Sep - 21 Sep	Ryanair
23 Sep - 26 Sep	Ryanair
30 Sep - 03 Oct	airBaltic
25 Sep - 27 Sep	Ryanair
26 Sep - 28 Sep	Wizz Air
27 Sep - 29 Sep	Ryanair
28 Sep - 03 Oct	Wizz Air
21 Sep - 25 Sep	Norwegian
28 Sep - 05 Oct	Norwegian

Also check the deals for one-way flights from Oslo to Charleroi 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 Oslo to Charleroi in September from $166

Return flights