AirHint found the following cheapest one-way flights from Lima (LIM) to Buenos Aires (AEP) in September 2025 (see full year).

One-Way flights

30 Sep	JetSmart	direct
27 Sep	JetSmart
29 Sep	Sky Airline
29 Sep	Sky Airline	direct
28 Sep	JetSmart
26 Sep	Sky Airline	direct
28 Sep	Sky Airline	direct
16 Sep	Sky Airline	direct
24 Sep	LATAM Airlines Group
17 Sep	Sky Airline	direct

Also check the deals for return flights from Lima 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.

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Cheapest one-way flights from Lima to Buenos Aires in September from 113€

One-Way flights