Depends on the class, but our top 4 guys in the class had over 4,000 hours combined flight time. If you have hours and a bad attitude, you'll go nowhere. If you've got hours, keep your mouth shut about them and are willing to learn more, you'll accel. IP's love to pick on the guys that talk about their civilian flying experience, whether it's helping them or not. They'll make an example out of you in no time. So if you do end up going to UPT with a few hundred plus hours of flight time, keep your mouth shut and let the IP's think you were born with great hands (sts).