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

Return flights

06 Dec - 13 Dec	Sky Airline
03 Dec - 09 Dec	Avianca
01 Dec - 08 Dec	LATAM Airlines Group
01 Dec - 15 Dec	LATAM Airlines Group
02 Dec - 18 Dec	Sky Airline
07 Dec - 14 Dec	Arajet
10 Dec - 11 Dec	LATAM Airlines Group
08 Dec - 15 Dec	LATAM Airlines Group
04 Dec - 26 Jan	LATAM Airlines Group
09 Dec - 10 Dec	LATAM Airlines Group
02 Dec - 12 Jan	Sky Airline
07 Dec - 24 Dec	LATAM Airlines Group
28 Dec - 13 Jan	Arajet
30 Dec - 17 Jan	Sky Airline
11 Dec - 08 Jan	Avianca
10 Dec - 07 Jan	Avianca
09 Dec - 07 Jan	Arajet
31 Dec - 07 Jan	Copa
25 Dec - 10 Jan	Arajet
13 Dec - 10 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 462€

Return flights