I'm flying DTW-ORD then ORD-PIT tomorrow and when I booked the trip, I was forced into the latest flights for each even though according to "expert" mode on the website there were lower fare class seats available on the earlier flights. I want to standby to get there earlier obviously, and I'm wondering if there is any way to see how full these flights are going to be so I know if I'll be wasting my time at the airport or not?