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

Return flights

29 Aug - 01 Sep	Spirit Airlines
29 Aug - 02 Sep	Spirit Airlines
31 Aug - 07 Sep	Spirit Airlines
27 Aug - 07 Sep	Spirit Airlines
28 Aug - 07 Sep	Spirit Airlines
19 Aug - 26 Aug	LATAM Airlines Group
26 Aug - 02 Sep	Spirit Airlines
21 Aug - 28 Aug	LATAM Airlines Group
21 Aug - 26 Aug	Spirit Airlines
21 Aug - 27 Aug	LATAM Airlines Group
19 Aug - 23 Aug	Spirit Airlines
28 Aug - 17 Sep	Frontier Airlines

Also check the deals for one-way flights from Newark to Buenos Aires in August.

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 August from 716€

Return flights