AirHint found the following cheapest return flights from Los Angeles (LAX) to San Juan (SJU) in September 2026 (see full year).

Return flights

29 Sep - 06 Oct	United
30 Sep - 07 Oct	United
23 Sep - 30 Sep	United
24 Sep - 01 Oct	United
25 Sep - 02 Oct	United
26 Sep - 03 Oct	United
09 Sep - 16 Sep	United
16 Sep - 23 Sep	United
19 Sep - 26 Sep	United
22 Sep - 29 Sep	United
15 Sep - 22 Sep	United
28 Sep - 05 Oct	United
17 Sep - 24 Sep	United
18 Sep - 25 Sep	United
21 Sep - 28 Sep	United
02 Sep - 09 Sep	United
27 Sep - 04 Oct	United

Also check the deals for one-way flights from Los Angeles 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 return flights from Los Angeles to San Juan in September from 245€

Return flights