AirHint found the following cheapest one-way flights from Newark (EWR) to Santiago (STI) in August 2025 (see full year).

One-Way flights

19 Aug	Spirit Airlines
20 Aug	Spirit Airlines
25 Aug	Spirit Airlines
21 Aug	Spirit Airlines
14 Aug	Spirit Airlines
18 Aug	Spirit Airlines
29 Aug	Spirit Airlines
26 Aug	Spirit Airlines
09 Aug	Spirit Airlines
13 Aug	Spirit Airlines

Also check the deals for return flights from Newark to Santiago 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 one-way flights from Newark to Santiago in August from $116

One-Way flights