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

Return flights

03 Sep - 25 Sep	Avianca
07 Sep - 20 Sep	Avianca
08 Sep - 18 Sep	Avianca
09 Sep - 22 Sep	Avianca
07 Sep - 18 Sep	Avianca
01 Sep - 30 Sep	Avianca
05 Sep - 11 Sep	Avianca
03 Sep - 09 Sep	Avianca
05 Sep - 15 Sep	Avianca
08 Sep - 14 Sep	Avianca
07 Sep - 06 Oct	Avianca
08 Sep - 08 Oct	Avianca
09 Sep - 09 Oct	Avianca
16 Sep - 07 Oct	Avianca
16 Sep - 08 Oct	Avianca
15 Sep - 15 Oct	Avianca
26 Sep - 30 Oct	Avianca
14 Sep - 14 Oct	Avianca
15 Sep - 01 Oct	Avianca
15 Sep - 09 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 469€

Return flights