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

Return flights

06 Aug - 20 Aug	SWISS
07 Aug - 27 Aug	Brussels Airlines
24 Aug - 15 Sep	TAP
21 Aug - 28 Aug	SWISS
27 Aug - 17 Sep	TAP
22 Aug - 12 Sep	Air Transat	direct
28 Aug - 17 Sep	TAP
07 Aug - 21 Aug	TAP
10 Aug - 24 Aug	TAP
13 Aug - 09 Sep	TAP
28 Aug - 16 Sep	TAP
31 Aug - 20 Sep	TAP
14 Aug - 09 Sep	TAP
27 Aug - 16 Sep	TAP
18 Aug - 09 Sep	TAP
11 Aug - 27 Aug	TAP
13 Aug - 27 Aug	TAP
10 Aug - 29 Aug	TAP
13 Aug - 29 Aug	TAP
14 Aug - 29 Aug	TAP

Also check the deals for one-way flights from Montreal to Barcelona 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.

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona

Cheapest return flights from Montreal to Barcelona in August from $367

Return flights