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

Return flights

05 May - 12 May	LATAM Airlines Group
27 May - 03 Jun	LATAM Airlines Group
18 May - 25 May	Copa
20 May - 27 May	Copa
25 May - 01 Jun	Copa
26 May - 02 Jun	Copa
07 May - 14 May	LATAM Airlines Group
04 May - 11 May	LATAM Airlines Group
06 May - 13 May	LATAM Airlines Group
13 May - 20 May	Copa
19 May - 26 May	Copa
12 May - 19 May	Copa
14 May - 21 May	Copa
30 May - 06 Jun	Air Canada
31 May - 07 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 $747

Return flights