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

Return flights

09 Sep - 16 Sep	Avianca
16 Sep - 27 Sep	Avianca
16 Sep - 23 Sep	Avianca
10 Sep - 16 Sep	Avianca
15 Sep - 27 Sep	Avianca
03 Sep - 25 Sep	Avianca
01 Sep - 08 Sep	Avianca
16 Sep - 07 Oct	Avianca
01 Sep - 09 Sep	Avianca
04 Sep - 25 Sep	Avianca
05 Sep - 27 Sep	Avianca
16 Sep - 14 Oct	Avianca
29 Sep - 06 Oct	Copa
29 Sep - 09 Oct	Copa
18 Sep - 07 Oct	Copa
17 Sep - 07 Oct	Copa
27 Sep - 07 Oct	Avianca
23 Sep - 01 Oct	Avianca
19 Sep - 08 Oct	Avianca
28 Sep - 08 Oct	Avianca

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 470€

Return flights