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

Return flights

17 Sep - 23 Sep	Wizz Air
24 Sep - 05 Oct	Wizz Air
20 Sep - 23 Sep	Wizz Air
28 Sep - 05 Oct	Wizz Air
23 Sep - 27 Sep	Ryanair
27 Sep - 04 Oct	Ryanair
27 Sep - 05 Oct	Ryanair
25 Sep - 01 Oct	Wizz Air
24 Sep - 27 Sep	Wizz Air
26 Sep - 04 Oct	Wizz Air
19 Sep - 29 Sep	Ryanair
29 Sep - 01 Oct	Wizz Air
20 Sep - 25 Sep	Wizz Air
18 Sep - 25 Sep	Wizz Air
24 Sep - 28 Sep	Wizz Air
26 Sep - 28 Sep	Wizz Air
20 Sep - 27 Sep	Wizz Air
21 Sep - 01 Oct	Ryanair
27 Sep - 03 Oct	Wizz Air
21 Sep - 02 Oct	Ryanair

Also check the deals for one-way flights from Charleroi to Keflavik 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 Charleroi to Keflavik in September from $200

Return flights