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

Return flights

03 Dec - 10 Dec	Spirit Airlines
05 Dec - 12 Dec	Spirit Airlines
04 Dec - 12 Dec	Spirit Airlines
31 Dec - 27 Jan	Spirit Airlines
01 Dec - 08 Dec	Spirit Airlines
18 Dec - 04 Jan	Spirit Airlines
12 Dec - 19 Dec	Spirit Airlines
27 Dec - 11 Jan	LATAM Airlines Group
12 Dec - 21 Dec	Spirit Airlines
28 Dec - 15 Jan	Spirit Airlines
03 Dec - 27 Dec	Spirit Airlines
11 Dec - 27 Dec	Spirit Airlines
04 Dec - 28 Dec	Spirit Airlines
17 Dec - 18 Jan	Spirit Airlines
11 Dec - 05 Jan	Spirit Airlines
24 Dec - 31 Dec	Spirit Airlines
16 Dec - 02 Jan	Spirit Airlines
23 Dec - 05 Jan	Spirit Airlines
27 Dec - 03 Jan	Spirit Airlines
29 Dec - 05 Jan	Spirit Airlines

Also check the deals for one-way flights from New York 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 New York to Buenos Aires in December from 861€

Return flights