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

Return flights

25 Sep - 28 Sep	Copa
26 Sep - 29 Sep	Copa
23 Sep - 29 Sep	Copa
24 Sep - 02 Oct	Copa
23 Sep - 25 Sep	Copa
25 Sep - 16 Oct	Copa
23 Sep - 04 Oct	Copa
28 Sep - 09 Oct	Arajet
30 Sep - 11 Oct	Sky Airline
18 Sep - 28 Sep	Arajet
18 Sep - 24 Sep	Arajet
17 Sep - 29 Sep	Arajet
24 Sep - 05 Oct	Arajet
17 Sep - 03 Oct	Arajet
25 Sep - 31 Oct	Arajet
21 Sep - 25 Sep	Arajet
20 Sep - 27 Sep	Arajet
29 Sep - 06 Oct	LATAM Airlines Group
23 Sep - 01 Oct	Copa
20 Sep - 21 Sep	Arajet

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

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 September from $598

Return flights