Anyone have any experience flying with Allegiant Air? We are thinking of booking with them in the future, however, I can't find any info on their website regarding medical supplies/equipment. My son uses oxygen (a portable concentrator) which I've found the info on and it should not be a problem. However, we will be carrying on some medical supplies as well as checking some. They charge $15 each way for checked bags, but do they charge if the bag is medical supplies?? Other airlines do not, but this airline seems to charge for everything!