AirHint found the following cheapest return flights from Cancun (CUN) to Buenos Aires (AEP) in September 2026 (see full year).

Return flights

11 Sep - 16 Sep	Avianca
17 Sep - 30 Sep	Avianca
30 Sep - 12 Oct	Avianca
01 Sep - 16 Sep	Avianca
24 Sep - 07 Oct	Avianca
28 Sep - 07 Oct	Avianca
29 Sep - 14 Oct	Viva
27 Sep - 14 Oct	Viva
13 Sep - 16 Sep	Viva
07 Sep - 16 Sep	Viva
04 Sep - 16 Sep	Viva
04 Sep - 06 Sep	Viva
06 Sep - 16 Sep	Viva
05 Sep - 16 Sep	Viva
29 Sep - 18 Oct	Viva
27 Sep - 18 Oct	Viva
26 Sep - 14 Oct	Viva
28 Sep - 14 Oct	Viva
23 Sep - 14 Oct	Viva
03 Sep - 16 Sep	Viva

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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Cheapest return flights from Cancun to Buenos Aires in September from 521€

Return flights