AirHint found the following cheapest return flights from San Francisco (SFO) to San Jose (SJO) in May 2026 (see full year).
Return flights
| 11 May - 18 May | Avianca | ||
| 26 May - 07 Jun | Avianca | ||
| 11 May - 18 May | United | direct | |
| 01 May - 10 May | United | direct | |
| 30 May - 07 Jun | Southwest Airlines |
Also check the deals for one-way flights from San Francisco to San Jose in May.
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