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

Return flights

03 Dec - 10 Dec	Avianca
05 Dec - 24 Dec	LATAM Airlines Group
06 Dec - 16 Dec	LATAM Airlines Group
01 Dec - 11 Dec	Avianca
04 Dec - 10 Dec	LATAM Airlines Group
05 Dec - 12 Dec	Avianca
04 Dec - 11 Dec	LATAM Airlines Group
29 Dec - 19 Jan	Avianca
04 Dec - 18 Dec	LATAM Airlines Group
15 Dec - 14 Jan	WestJet
16 Dec - 24 Dec	Flair Airlines
15 Dec - 31 Dec	WestJet
15 Dec - 13 Jan	WestJet
15 Dec - 08 Jan	WestJet
10 Dec - 11 Jan	Avianca
26 Dec - 21 Jan	WestJet
10 Dec - 10 Jan	WestJet
16 Dec - 14 Jan	Flair Airlines
26 Dec - 20 Jan	Avianca
26 Dec - 22 Jan	Avianca

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

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 December from 675€

Return flights