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

Return flights

15 Aug - 22 Aug	Arajet
27 Aug - 03 Sep	Avianca
25 Aug - 10 Sep	Copa
26 Aug - 02 Sep	Copa
28 Aug - 04 Sep	Copa
25 Aug - 01 Sep	Copa
21 Aug - 28 Aug	LATAM Airlines Group
19 Aug - 26 Aug	Copa
22 Aug - 29 Aug	LATAM Airlines Group
29 Aug - 05 Sep	LATAM Airlines Group
06 Aug - 13 Aug	Air Canada
20 Aug - 27 Aug	Air Canada
13 Aug - 20 Aug	Air Canada
31 Aug - 13 Sep	Air Canada
31 Aug - 07 Sep	Copa
12 Aug - 19 Aug	LATAM Airlines Group
14 Aug - 21 Aug	LATAM Airlines Group
11 Aug - 18 Aug	LATAM Airlines Group
30 Aug - 06 Sep	Avianca

Also check the deals for one-way flights from Montreal to Buenos Aires 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 Buenos Aires in August from 611€

Return flights