AirHint found the following cheapest return flights from Lima (LIM) to Buenos Aires (AEP) in December 2025 (see full year).

Return flights

02 Dec - 04 Dec	JetSmart	direct
17 Dec - 05 Jan	JetSmart
10 Dec - 12 Dec	JetSmart	direct
10 Dec - 13 Dec	JetSmart	direct
13 Dec - 31 Dec	JetSmart
17 Dec - 31 Dec	JetSmart
10 Dec - 31 Dec	JetSmart
01 Dec - 04 Dec	JetSmart
02 Dec - 05 Dec	JetSmart	direct
17 Dec - 07 Jan	JetSmart
06 Dec - 09 Dec	JetSmart	direct
06 Dec - 12 Dec	JetSmart	direct
29 Dec - 11 Jan	JetSmart
29 Dec - 12 Jan	JetSmart
29 Dec - 05 Jan	JetSmart
16 Dec - 05 Jan	JetSmart
20 Dec - 05 Jan	JetSmart
31 Dec - 11 Jan	JetSmart
31 Dec - 12 Jan	JetSmart
31 Dec - 05 Jan	JetSmart

Also check the deals for one-way flights from Lima to Buenos Aires in December.

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 Lima to Buenos Aires in December from $359

Return flights