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

One-Way flights

07 Sep	American Airlines
14 Sep	Spirit Airlines	direct
07 Sep	Spirit Airlines	direct
20 Sep	Spirit Airlines
17 Sep	Spirit Airlines
25 Sep	Spirit Airlines	direct
19 Sep	Spirit Airlines
24 Sep	Spirit Airlines
01 Sep	Spirit Airlines
27 Sep	Spirit Airlines

Also check the deals for return flights from Houston to San Juan in September.

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 September from $87

One-Way flights