I'm not sure if your talking about how long the ACTUALL flight is, or how long the padded "flight" is. If your referring to the time between the schedule departure and scheduled arrival "the padded flight", then just hope over to ual.com/ua.exe (I think that's the URL) to download the timetable, which lists durations. You can also get there by going to UAL.com and clicking on Timetables on the lower left hand side. If your referring to how long the actuall time in the air is, it's going to be pretty hard to tell because of winds, weather, ATC, airport congestion, and most importantly, how quickly the pilot wants to get home.