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

Return flights

28 Oct - 13 Nov	Avianca
26 Oct - 05 Nov	Avianca
28 Oct - 04 Nov	Avianca
31 Oct - 10 Nov	LATAM Airlines Group
31 Oct - 11 Nov	LATAM Airlines Group
29 Oct - 12 Nov	Avianca
26 Oct - 01 Nov	Copa
20 Oct - 02 Nov	Copa
21 Oct - 31 Oct	LATAM Airlines Group
26 Oct - 31 Oct	LATAM Airlines Group
31 Oct - 08 Nov	LATAM Airlines Group
22 Oct - 01 Nov	Copa
17 Oct - 28 Oct	Avianca
18 Oct - 25 Oct	Volaris Costa Rica
15 Oct - 29 Oct	Arajet
22 Oct - 29 Oct	Avianca
28 Oct - 30 Oct	LATAM Airlines Group
19 Oct - 30 Oct	LATAM Airlines Group
15 Oct - 21 Oct	Copa
15 Oct - 19 Oct	Copa

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 529€

Return flights