AirHint found the following cheapest return flights from Ottawa (YOW) to Brussels (BRU) in August 2025 (see full year).

Return flights

25 Aug - 20 Sep	Air Canada
28 Aug - 07 Sep	Air Canada
28 Aug - 20 Sep	Air Canada
27 Aug - 20 Sep	Lufthansa
26 Aug - 20 Sep	Air Canada
24 Aug - 13 Sep	Air Canada
22 Aug - 29 Aug	Air Canada
27 Aug - 28 Aug	Porter Airlines (Canada) Ltd
19 Aug - 25 Aug	Porter Airlines (Canada) Ltd
19 Aug - 26 Aug	Porter Airlines (Canada) Ltd
19 Aug - 24 Aug	Porter Airlines (Canada) Ltd

Also check the deals for one-way flights from Ottawa to Brussels 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 Ottawa to Brussels in August from $901

Return flights