Recently relocated my office so now I am now equal distance to SAC, SFO, OAK, and even STS. In the past my go to airports were SFO and OAK and occasional SJC. I am new to this thread and will check out some of the above posts but I recently booked some flight out of SAC on UA which seemed better priced than OAK or SFO so that was a plus. I suspect parking is cheaper at SAC as well but don't know. Curious about upgrade availability (UA mostly) out of SAC compared to SFO for example where upgrades can be as rare as hen's teeth on UA. Any and all info from seasoned SAC users would be much appreciated.