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

Return flights

04 Dec - 11 Dec	Spirit Airlines
05 Dec - 12 Dec	Spirit Airlines
01 Dec - 09 Dec	Delta
11 Dec - 23 Dec	Delta
05 Dec - 15 Dec	Spirit Airlines
06 Dec - 12 Dec	Spirit Airlines
01 Dec - 07 Dec	Spirit Airlines
13 Dec - 24 Dec	Spirit Airlines
06 Dec - 13 Dec	Spirit Airlines
04 Dec - 07 Dec	Delta
30 Dec - 12 Jan	Spirit Airlines
29 Dec - 13 Jan	United
31 Dec - 19 Jan	United
15 Dec - 13 Jan	Spirit Airlines
24 Dec - 18 Jan	Spirit Airlines
27 Dec - 12 Jan	Frontier Airlines
31 Dec - 18 Jan	Spirit Airlines
21 Dec - 25 Jan	Spirit Airlines
27 Dec - 16 Jan	Delta
12 Dec - 06 Jan	Frontier 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 579€

Return flights