AirHint found the following cheapest return flights from Toronto (YYZ) to Buenos Aires (EZE) in September 2025 (see full year).

Return flights

17 Sep - 24 Sep	Air Canada
10 Sep - 17 Sep	Air Canada
04 Sep - 09 Sep	Copa
18 Sep - 25 Sep	Copa
01 Sep - 17 Sep	Copa
22 Sep - 25 Sep	Copa
26 Sep - 11 Oct	Air Canada
26 Sep - 05 Oct	LATAM Airlines Group
26 Sep - 12 Oct	LATAM Airlines Group
07 Sep - 16 Sep	Delta
01 Sep - 15 Sep	Copa
01 Sep - 07 Sep	Copa

Also check the deals for one-way flights from Toronto to Buenos Aires in September.

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 Toronto to Buenos Aires in September from $760

Return flights