They _may_ hit you with a $40 rebooking fee if you cancel. They've been very kind to me recently, and have not charged for several work related changes. Nonetheless, this is considerably less than the $100 that virtually every other airline will charge you for rebooking.

That said, when I've rebooked using credit on-line, they ask for the confirmation number of your previous reservation. You have an opportunity to enter several reservation credit numbers, should you have a little from one and a bit from another. So, you could conceivably combine several cancelled trips. Again, they may place a charge on cancellations.

That said, I can't give this company enough praise for how they handle issues like this. I'll use 'em whenever I can! Too bad they don't go to Europe...

JP