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

Return flights

12 Sep - 25 Sep	Copa
17 Sep - 24 Sep	Copa
17 Sep - 29 Sep	Copa
15 Sep - 29 Sep	Copa
15 Sep - 08 Oct	Copa
16 Sep - 08 Oct	Copa
17 Sep - 03 Oct	Copa
18 Sep - 28 Sep	Copa
15 Sep - 22 Sep	Copa
23 Sep - 30 Sep	Copa
23 Sep - 29 Sep	Copa
23 Sep - 07 Oct	Copa
23 Sep - 01 Oct	Copa
29 Sep - 16 Oct	Aeromexico
29 Sep - 13 Oct	Aeromexico
29 Sep - 08 Oct	Aeromexico
16 Sep - 07 Oct	Arajet
16 Sep - 10 Oct	Arajet
13 Sep - 14 Sep	Copa
09 Sep - 20 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 $592

Return flights