AirHint found the following cheapest return flights from Montreal (YUL) to Charleroi (CRL) in August 2025 (see full year).

Return flights

04 Aug - 02 Sep	FrenchBee
26 Aug - 02 Sep	FrenchBee
25 Aug - 01 Sep	WestJet
24 Aug - 31 Aug	WestJet
31 Aug - 20 Sep	FrenchBee
28 Aug - 04 Sep	FrenchBee
27 Aug - 03 Sep	FrenchBee
31 Aug - 07 Sep	FrenchBee
20 Aug - 27 Aug	WestJet
23 Aug - 31 Aug	WestJet
19 Aug - 26 Aug	FrenchBee
21 Aug - 28 Aug	Porter Airlines (Canada) Ltd
30 Aug - 06 Sep	Porter Airlines (Canada) Ltd
22 Aug - 29 Aug	Porter Airlines (Canada) Ltd
22 Aug - 24 Aug	WestJet
19 Aug - 15 Sep	Air Transat
22 Aug - 30 Aug	WestJet
11 Aug - 01 Sep	Air Transat
03 Aug - 27 Aug	WestJet
14 Aug - 21 Aug	FrenchBee

Also check the deals for one-way flights from Montreal to Charleroi in August.

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 Montreal to Charleroi in August from $684

Return flights