Originally Posted by Pat89339

Your profile shows that you are Premier Exec which UA has mapped to 4th tier in the CPU upgrade scheme: GS>1K>Platinum>Gold>Silver>Dirt. As a 1K I often buy tickets at the last minute. Last week I bought a ticket the same day that I flew, about 6 hours in advance and I was #1 on the upgrade list with 1 seat remaining. I cleared at the airport less than an hour before the flight. Of course it is route dependent, but your chances of clearing with higher status is greater.