Oneworld airlines American and British Airways have San Jose SJC to Geneva, Switzerland basic economy tickets at $324 round trip for travel departures from mid-January to early March 2019.
One-stop itineraries flying San Jose to London via British Airways offer good schedules at a low ticket price.
American Airlines (British Airways flights)
San Jose SJC – London LHR – Geneva GVA – London LHR – San Jose SJC
$323.73 round trip Sun Feb 17 – Tue Feb 26