AirHint found the following cheapest return flights from Mexico City (MEX) to Buenos Aires (AEP) in October 2025 (see full year).

Return flights

31 Oct - 23 Nov	LATAM Airlines Group
27 Oct - 04 Nov	LATAM Airlines Group
26 Oct - 08 Nov	LATAM Airlines Group
26 Oct - 19 Nov	LATAM Airlines Group
28 Oct - 10 Nov	LATAM Airlines Group
30 Oct - 13 Nov	LATAM Airlines Group
26 Oct - 09 Nov	LATAM Airlines Group
31 Oct - 09 Nov	LATAM Airlines Group
27 Oct - 09 Nov	LATAM Airlines Group
31 Oct - 08 Nov	LATAM Airlines Group
06 Oct - 10 Oct	Avianca
07 Oct - 22 Oct	Arajet
07 Oct - 30 Oct	Arajet
06 Oct - 15 Oct	Copa
01 Oct - 04 Oct	Copa
07 Oct - 16 Oct	Arajet
01 Oct - 14 Oct	Viva
23 Oct - 26 Oct	Arajet
12 Oct - 22 Oct	Arajet
19 Oct - 31 Oct	Arajet

Also check the deals for one-way flights from Mexico City to Buenos Aires in October.

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 Mexico City to Buenos Aires in October from $662

Return flights