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

Return flights

29 Dec - 29 Jan	Avianca
28 Dec - 28 Jan	Copa
19 Dec - 23 Dec	Avianca
27 Dec - 09 Jan	Sky Airline
25 Dec - 08 Jan	Sky Airline
20 Dec - 12 Jan	LATAM Airlines Group
19 Dec - 22 Dec	LATAM Airlines Group
24 Dec - 10 Jan	Avianca
23 Dec - 30 Dec	Sky Airline
23 Dec - 31 Dec	Sky Airline
23 Dec - 07 Jan	Sky Airline
23 Dec - 09 Jan	Sky Airline
23 Dec - 08 Jan	Sky Airline
25 Dec - 06 Jan	Sky Airline
21 Dec - 27 Dec	Arajet
22 Dec - 29 Dec	LATAM Airlines Group
22 Dec - 28 Dec	LATAM Airlines Group
23 Dec - 28 Dec	Sky Airline
22 Dec - 31 Dec	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 636€

Return flights