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

Return flights

15 Oct - 02 Nov	JetSmart
31 Oct - 04 Nov	JetSmart
05 Oct - 18 Oct	JetSmart
03 Oct - 17 Oct	JetSmart
06 Oct - 20 Oct	Copa
03 Oct - 18 Oct	JetSmart
02 Oct - 17 Oct	LATAM Airlines Group
06 Oct - 18 Oct	LATAM Airlines Group
06 Oct - 17 Oct	LATAM Airlines Group
26 Oct - 27 Oct	LATAM Airlines Group
12 Oct - 19 Oct	LATAM Airlines Group
15 Oct - 22 Oct	LATAM Airlines Group
28 Oct - 04 Nov	Avianca
24 Oct - 03 Nov	Avianca
27 Oct - 10 Nov	Avianca

Also check the deals for one-way flights from Quito 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 Quito to Buenos Aires in October from 431€

Return flights