Recognize Spirit Airlines Baggage Policy to guarantee a trouble-free journey. One complimentary personal item per passenger, such as a tiny pocketbook or bag, is allowed. There are additional costs for checked and carry-on bags, which change depending on your flight and when you buy. To save further expenses, make sure you abide by the weight and dimension limitations. Overweight or oversized baggage will cost more. It will be easier on your travels and prevent unpleasant surprises at the airport if you are aware of these regulations before you depart.