More than a thousand flights had been cancelled by Monday evening because of Tropical Storm Isaac, and the airlines were starting to rebook flights in and out of South Florida as the storm moved north toward landfall. Federal regulations require airlines to refund ticket prices to passengers whose flights were cancelled, but what happens when you don't want a refund, when you still want to get to that destination? There are almost as many responses as there are airlines. Scott Mayerowitz of the Associated Press has compiled information on what most of the major airlines are doing as far as rebooking flights and how far in the future they'll let you rebook without charging a change fee. Click here for the story.