Although there is a caveat to this. Your reservation online can show upgrade: pending and even the note below says something like "blah blah blah 1K upgrades at 100 hours" but the UA system could have you listed as a different priority in my case as PremEx. I knew this would happen and kept calling and telling them to purge the record and at least three agents were like no the reservation says 1K. Well guess what 100 hours and no change to upgrade: waitlisted or confirmed. Called again and the agents said oh it will happen late in the day. Hung up called again finally got an agent to purge record then upgrade status changed. So basically lost out when the 1K window was open because system saw me as PremEx even agent said i would have cleared before others on lower fares So stuck in Y thanks to agents blowing me off.