I am waitlisted for my UG on today's (12/30) UA91 PHL-SFO (A319) and wondering if it's worth going to the airport early for earlier connecting flights for a better chance of clearing the list. The ones I am currently comtemplating are:

UA7261-UA189/187 PHL-IAD-SFO (CRJ-B752/B752)
UA563-UA907 PHL-ORD-SFO (B735-A320)
UA509-UA253 PHL-DEN-SFO (B752-B763)

Any suggestions/comments appreciated? Thanks in advance.

LAX