Originally Posted by atl runner

Are you subscribed to their Premium service? If so, enter the starting and ending airports (BWI and CVG???)--the date, the approximate time of the flight (making it a little earlier than the scheduled departure time--not later), dl for Delta and V class. Doing that, you'll see how many seats are available for upgrade. If it says V9, that means there are at least 9 seats available for upgrade, although there could be more (9 is the most they will show). V5 would mean five, etc. If the flight doesn't show that means none are available, although that doesn't mean you won't eventually get upgraded at the gate anyway. I think this info is basically right, although I'm somewhat new to expertflyer myself, so if someone wants to add something to this or correct me, chime in.