AirHint found the following cheapest return flights from Quito (UIO) to Buenos Aires (AEP) in March 2026 (see full year).

Return flights

29 Mar - 10 Apr	JetSmart
22 Mar - 10 Apr	JetSmart
20 Mar - 10 Apr	JetSmart
29 Mar - 01 Apr	JetSmart
22 Mar - 01 Apr	JetSmart
18 Mar - 01 Apr	JetSmart
20 Mar - 01 Apr	JetSmart
15 Mar - 01 Apr	JetSmart
29 Mar - 04 Apr	JetSmart
18 Mar - 22 Mar	JetSmart
20 Mar - 22 Mar	JetSmart
15 Mar - 22 Mar	JetSmart
06 Mar - 22 Mar	JetSmart
22 Mar - 29 Mar	JetSmart
18 Mar - 29 Mar	JetSmart
20 Mar - 29 Mar	JetSmart
15 Mar - 29 Mar	JetSmart
15 Mar - 18 Mar	JetSmart
06 Mar - 18 Mar	JetSmart
25 Mar - 10 Apr	JetSmart

Also check the deals for one-way flights from Quito to Buenos Aires in March.

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 March from $557

Return flights