Cheapest one-way flights from Los Angeles to San Juan in September from $125

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

One-Way flights

20 Sep Frontier Airlines
13 Sep Frontier Airlines
12 Sep Frontier Airlines
14 Sep Frontier Airlines
15 Sep Frontier Airlines
18 Sep Spirit Airlines
25 Sep United
06 Sep Spirit Airlines
03 Sep Spirit Airlines

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

Skyscanner

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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