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

One-Way flights

17 Aug	United	direct
24 Aug	Southwest Airlines
10 Aug	Frontier Airlines
31 Aug	Spirit Airlines	direct
09 Aug	Spirit Airlines	direct
12 Aug	Spirit Airlines	direct
10 Aug	Spirit Airlines	direct
23 Aug	Frontier Airlines
22 Aug	Spirit Airlines
01 Aug	Spirit Airlines

Also check the deals for return flights from Houston 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 Houston to San Juan in August from $78

One-Way flights