I've been able to get both AA and HI to give me differnt flights...on the same day and to the same destination... when they changed flight times on me. I called their FF lines and was really nice to the agents...pointed out their change, the difficulty it posed and asked to move to a new flight. It worked both times...they were great...it's amazing how helpful many of the agents are when you are nice to them. Give it a try...good luck.