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

Return flights

29 Sep - 01 Oct	Spirit Airlines
29 Sep - 03 Oct	Spirit Airlines
29 Sep - 05 Oct	Spirit Airlines
29 Sep - 19 Oct	Spirit Airlines
29 Sep - 16 Oct	Spirit Airlines
29 Sep - 09 Oct	Spirit Airlines
30 Sep - 03 Oct	Spirit Airlines
30 Sep - 05 Oct	Spirit Airlines
29 Sep - 20 Oct	Spirit Airlines
29 Sep - 18 Oct	Spirit Airlines
28 Sep - 30 Sep	Avianca
23 Sep - 30 Sep	Spirit Airlines
15 Sep - 20 Sep	Copa
18 Sep - 24 Sep	Copa
15 Sep - 19 Sep	Copa
26 Sep - 28 Sep	Copa
15 Sep - 28 Sep	Copa
16 Sep - 23 Sep	Copa
16 Sep - 24 Sep	Copa
16 Sep - 26 Sep	Copa

Also check the deals for one-way flights from Los Angeles to San Jose 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.

Book a cheap hotel in San Jose

Cheap car rent in San Jose

Cheapest return flights from Los Angeles to San Jose in September from 196€

Return flights