How does Spirit Airlines exactly work. Is it worth buying there credit card to make use of there special priced tickets and could both of us use the same credit card or do we have to have one each and do you have to pay for all luggage even carry on's. They are flying out of a local airport and we were thinking of flying them this coming December. There would be no charge for parking at the airport (which is a big plus) and we would not have to travel 2 parkways to get to the airport which could be a hassle if your traveling right at rush hour.