AirHint found the following cheapest return flights from Cancun (CUN) to Buenos Aires (EZE) in December 2025 (see full year).

Return flights

11 Dec - 15 Dec	Copa
10 Dec - 13 Dec	Copa
15 Dec - 24 Dec	Arajet
08 Dec - 15 Dec	Aeromexico
06 Dec - 13 Dec	Aeromexico
10 Dec - 16 Dec	Copa
12 Dec - 16 Dec	Copa
07 Dec - 14 Dec	Copa
04 Dec - 11 Dec	Copa
03 Dec - 10 Dec	Copa
23 Dec - 30 Jan	Aeromexico
15 Dec - 20 Jan	Arajet
15 Dec - 12 Jan	Arajet
15 Dec - 25 Jan	Arajet
12 Dec - 13 Jan	Arajet
15 Dec - 11 Jan	Arajet
12 Dec - 15 Jan	Arajet
15 Dec - 09 Jan	Arajet
10 Dec - 09 Jan	Avianca
11 Dec - 14 Jan	Arajet

Also check the deals for one-way flights from Cancun 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 Cancun to Buenos Aires in December from $602

Return flights