Cheapest return flights from Los Angeles to San Juan in September from $263

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

Return flights

11 Sep - 18 Sep Frontier Airlines
05 Sep - 07 Sep Frontier Airlines
06 Sep - 13 Sep Frontier Airlines
27 Sep - 07 Oct Frontier Airlines
02 Sep - 07 Sep Frontier Airlines
18 Sep - 22 Sep Spirit Airlines
28 Sep - 05 Oct Frontier Airlines
18 Sep - 29 Sep Spirit Airlines
18 Sep - 27 Sep Spirit Airlines
19 Sep - 28 Sep Frontier Airlines
28 Sep - 29 Sep Spirit Airlines
18 Sep - 28 Sep Spirit Airlines
18 Sep - 05 Oct Spirit Airlines
18 Sep - 02 Oct Spirit Airlines
28 Sep - 02 Oct Spirit Airlines
28 Sep - 11 Oct Spirit Airlines
28 Sep - 19 Oct Spirit Airlines
27 Sep - 05 Oct Spirit Airlines
27 Sep - 02 Oct Spirit Airlines
19 Sep - 05 Oct Spirit Airlines

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.