Cheapest return flights from Los Angeles to San Juan in September from $237

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

Return flights

20 Sep - 25 Sep Spirit Airlines
20 Sep - 02 Oct Spirit Airlines
13 Sep - 25 Sep Spirit Airlines
13 Sep - 02 Oct Spirit Airlines
20 Sep - 06 Oct Spirit Airlines
20 Sep - 28 Sep Spirit Airlines
20 Sep - 24 Sep Spirit Airlines
20 Sep - 26 Sep Spirit Airlines
27 Sep - 02 Oct Spirit Airlines
20 Sep - 05 Oct Spirit Airlines
06 Sep - 13 Sep Frontier Airlines
15 Sep - 26 Sep Frontier Airlines
27 Sep - 04 Oct Frontier Airlines
01 Sep - 04 Sep Frontier Airlines
30 Sep - 02 Oct United
05 Sep - 13 Sep Frontier Airlines
01 Sep - 06 Sep Frontier Airlines
28 Sep - 05 Oct Frontier Airlines
27 Sep - 06 Oct Spirit Airlines
30 Sep - 07 Oct United

Also check the deals for one-way 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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Feel free to contact us with any feedback or request another flight research.