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

Return flights

13 May - 20 May	Copa
06 May - 13 May	Copa
12 May - 26 May	Delta
20 May - 27 May	Air Canada
05 May - 12 May	LATAM Airlines Group
01 May - 08 May	LATAM Airlines Group
07 May - 14 May	LATAM Airlines Group
14 May - 21 May	Copa
18 May - 25 May	Copa
21 May - 28 May	Copa
25 May - 01 Jun	Copa
26 May - 02 Jun	Copa
27 May - 03 Jun	Air Canada
28 May - 04 Jun	Copa
29 May - 05 Jun	Copa
31 May - 07 Jun	Copa
30 May - 06 Jun	Copa

Also check the deals for one-way flights from Montreal to Buenos Aires in May.

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 May from $772

Return flights