AirHint found the following cheapest one-way flights from Charlotte (CLT) to San Juan (SJU) in August 2025 (see full year).

One-Way flights

05 Aug	Frontier Airlines	direct
17 Aug	Frontier Airlines	direct
10 Aug	Frontier Airlines	direct
22 Aug	Spirit Airlines
21 Aug	Spirit Airlines
07 Aug	Frontier Airlines	direct
04 Aug	Spirit Airlines
11 Aug	Spirit Airlines
02 Aug	Spirit Airlines
08 Aug	Spirit Airlines

Also check the deals for return flights from Charlotte to San Juan 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 Charlotte to San Juan in August from $129

One-Way flights