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

Return flights

27 May - 03 Jun	Copa
20 May - 27 May	Avianca
25 May - 01 Jun	Avianca
06 May - 13 May	Avianca
11 May - 18 May	Avianca
13 May - 20 May	Avianca
17 May - 24 May	Avianca
18 May - 25 May	Avianca
07 May - 14 May	Copa
14 May - 21 May	Copa
19 May - 26 May	Copa
21 May - 28 May	Copa
26 May - 02 Jun	LATAM Airlines Group
29 May - 05 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 $760

Return flights