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
01 May - 08 May	Avianca
11 May - 18 May	Avianca
13 May - 20 May	Avianca
15 May - 22 May	Avianca
04 May - 11 May	Avianca
06 May - 13 May	Avianca
08 May - 15 May	Avianca
18 May - 25 May	Avianca
20 May - 27 May	Avianca
27 May - 03 Jun	Air Canada
25 May - 01 Jun	Avianca
28 May - 04 Jun	Air Canada
30 May - 06 Jun	Air Canada
29 May - 05 Jun	Avianca
31 May - 07 Jun	Avianca

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 639€

Return flights