Oh, I didn't realize that about Southwest tomorrow. I guess I better get my credit card out.
On the potty training, I think every kid is different. We basically had our son to the point where he didn't want to do it in the diaper, but didn't want to go in the potty either. That was a really fun couple of weeks. We really forced the issue because we had signed him up for preschool where we needed to bed potty trained. If your son doesn't care about going in his underwear then I think it is pretty hard.
Good Luck.