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

Return flights

26 Aug - 31 Aug	Spirit Airlines
25 Aug - 29 Aug	Spirit Airlines
19 Aug - 21 Aug	Spirit Airlines
24 Aug - 29 Aug	Spirit Airlines
28 Aug - 02 Sep	Arajet
21 Aug - 26 Aug	Spirit Airlines
20 Aug - 26 Aug	Arajet
19 Aug - 22 Aug	Frontier Airlines
23 Aug - 29 Aug	Hahn Air Technologies
19 Aug - 24 Aug	Spirit Airlines
24 Aug - 28 Aug	Frontier Airlines
29 Aug - 01 Sep	Spirit Airlines

Also check the deals for one-way flights from Newark to Willemstad 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 Willemstad in August from 645€

Return flights