Never, never, never fly with Spirit Airlines. They are NOT the cheapest. They aren't even close to being cheaper!! They advertise cheap prices but by the time they nickel and dime you to death you actually pay more than any other airline. In addition to costing more, they completely destroyed my luggage. I've done a lot of travelling and I can honesly say my luggage has never been so badly damaged. The contents inside that were tightly wrapped and packed between several layers of clothing were also smashed.
When I complained about my brand new luggage and contents, Spirit offered to refund my baggage fee of $38!! They have still not agreed to compensate me for my destroyed luggage or smashed contents even after I advised that I have photos of the damage that were taken right in the airport and I have receipts proving my luggage was brand new the day before my flight. I will be pursuing this matter further but wanted to warn anyone considering flying with Spirit Airlines!!
I would rather drive then fly with them again!