AirHint found the following cheapest return flights from Montreal (YUL) to Buenos Aires (EZE) in August 2026 (see full year).

Return flights

19 Aug - 26 Aug	Copa
20 Aug - 27 Aug	Copa
26 Aug - 02 Sep	Copa
05 Aug - 12 Aug	Avianca
07 Aug - 14 Aug	Avianca
10 Aug - 17 Aug	Avianca
12 Aug - 19 Aug	Avianca
14 Aug - 21 Aug	Avianca
17 Aug - 24 Aug	Avianca
21 Aug - 28 Aug	Avianca
24 Aug - 31 Aug	Avianca
28 Aug - 04 Sep	Avianca
31 Aug - 07 Sep	Avianca
25 Aug - 01 Sep	Copa
30 Aug - 06 Sep	Avianca
29 Aug - 05 Sep	Copa

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 666€

Return flights