Cheapest return flights from San Francisco to San Jose in September from 324€

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

Return flights

23 Sep - 29 Sep Frontier Airlines
23 Sep - 30 Sep Frontier Airlines
16 Sep - 23 Sep Frontier Airlines
22 Sep - 25 Sep Frontier Airlines
24 Sep - 28 Sep Frontier Airlines
15 Sep - 19 Sep Avianca
19 Sep - 25 Sep Avianca
26 Sep - 28 Sep Frontier Airlines
13 Sep - 20 Sep Frontier Airlines
11 Sep - 18 Sep Frontier Airlines

Also check the deals for one-way flights from San Francisco to San Jose 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 Jose

Cheap car rent in San Jose

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