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

Return flights

23 Jul - 30 Jul	Sky Airline
23 Jul - 13 Aug	Sky Airline
22 Jul - 30 Jul	Avianca
21 Jul - 30 Jul	Avianca
22 Jul - 12 Aug	Avianca
22 Jul - 29 Jul	Arajet
31 Jul - 03 Aug	Copa
23 Jul - 31 Jul	Sky Airline
27 Jul - 04 Aug	Sky Airline
24 Jul - 31 Jul	Avianca
28 Jul - 06 Aug	Copa
26 Jul - 10 Aug	Avianca
26 Jul - 02 Aug	Avianca
29 Jul - 19 Aug	Arajet
25 Jul - 01 Aug	Avianca
30 Jul - 06 Aug	Avianca

Also check the deals for one-way flights from Cancun to Buenos Aires in July.

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 July from $756

Return flights