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

Return flights

17 Dec - 12 Jan	Spirit Airlines
05 Dec - 13 Dec	LATAM Airlines Group
05 Dec - 14 Dec	LATAM Airlines Group
02 Dec - 31 Dec	Spirit Airlines
21 Dec - 24 Dec	Spirit Airlines
24 Dec - 31 Dec	Spirit Airlines
26 Dec - 01 Jan	Arajet
11 Dec - 29 Dec	Spirit Airlines
24 Dec - 06 Jan	Spirit Airlines
18 Dec - 31 Dec	Aeromexico
11 Dec - 05 Jan	Spirit Airlines
24 Dec - 29 Dec	Spirit Airlines
16 Dec - 05 Jan	Spirit Airlines
17 Dec - 05 Jan	Spirit Airlines
19 Dec - 23 Jan	Spirit Airlines
26 Dec - 05 Jan	Spirit Airlines
27 Dec - 03 Jan	Spirit Airlines
30 Dec - 04 Jan	Spirit Airlines

Also check the deals for one-way flights from Newark 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 Newark to Buenos Aires in December from 976€

Return flights