I got out of Philly on Thursday afternoon instead of Friday. This was on my outbound segment, but I was only charged a $75 change fee. Also, know the schedules of other carriers going to your destination.

I had a flight out of Manchester, NH that was delayed, so I called my travel agent. I saw a United flight getting out on time, so I had her make a reservation on that flight while I was still in line. Then when I got to the counter, I told them of my reservation and they gave me the endorsement.