Do TP check-in desks open 3 or 4 hours prior to the flight departure time at SFO? I can't find this info on TP's website (SFO is missing on their list of airports), and my email to TP customer service has not been answered after a few weeks.

Also, I assume that I can check in online the night before, and if I don't have checked bags, I can go straight through to security and the lounge even if the check in desks for TP are not open yet, right? (I will be at SFO around 4 hours prior to flight departure.)