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

Return flights

04 Dec - 15 Dec	Sky Airline
06 Dec - 13 Dec	Sky Airline
02 Dec - 09 Dec	Avianca
04 Dec - 12 Dec	Sky Airline
03 Dec - 13 Dec	LATAM Airlines Group
03 Dec - 14 Dec	LATAM Airlines Group
11 Dec - 15 Jan	Arajet
03 Dec - 11 Dec	LATAM Airlines Group
02 Dec - 12 Jan	Arajet
11 Dec - 13 Jan	Arajet
13 Dec - 19 Dec	Avianca
24 Dec - 16 Jan	Avianca
13 Dec - 30 Dec	Avianca
17 Dec - 20 Dec	LATAM Airlines Group
27 Dec - 08 Jan	Sky Airline
15 Dec - 12 Jan	LATAM Airlines Group
10 Dec - 14 Jan	Avianca
16 Dec - 27 Jan	Sky Airline
17 Dec - 28 Jan	LATAM Airlines Group
22 Dec - 12 Jan	Avianca

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 $621

Return flights