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

Return flights

24 Sep - 08 Oct	Wizz Air
30 Sep - 02 Oct	Wizz Air
30 Sep - 17 Oct	Wizz Air
06 Sep - 13 Sep	Ryanair
20 Sep - 05 Oct	Wizz Air
23 Sep - 25 Sep	Ryanair
23 Sep - 05 Oct	Wizz Air
25 Sep - 11 Oct	Wizz Air
02 Sep - 01 Oct	Ryanair
28 Sep - 02 Oct	Ryanair
20 Sep - 27 Sep	Ryanair
18 Sep - 25 Sep	Ryanair
06 Sep - 07 Sep	Ryanair
02 Sep - 06 Sep	Wizz Air
23 Sep - 06 Oct	Ryanair
29 Sep - 01 Oct	Ryanair
06 Sep - 20 Sep	Ryanair
11 Sep - 18 Sep	Ryanair
11 Sep - 17 Sep	Ryanair
13 Sep - 17 Sep	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 197€

Return flights