As of September 2015, the only way to avoid paying a Spirit Airline baggage fee is to travel with only a small personal item. The personal item can be a purse, backpack or other item that can fit easily under the seat. Customers can pay reduced baggage fares for carry-on and checked luggage by joining Spirit's $9 Fare Club, paying online at the time of booking or paying online before or when checking in for the flight.
Paying for luggage at the airport reservations desk or at the gate are the most expensive ways of checking baggage. The more bags a passenger has, the higher the cost per bag. Baggage fares are required for each bag each way on Spirit flights. Overweight and oversized baggage incurs an additional fee per bag each way. Sporting equipment also incurs an additional fee, unless the items being transported are snowboards, golf clubs or skis. Those items do not require an additional oversized baggage fee but may incur an overweight baggage fee.
Spirit Airlines requires customers to pay a base, or "bare," fare, then pay additional fees for other options such as baggage, seat reservations, larger seats and printing boarding passes at the airport. Spirit charges less to book baggage online because doing so doesn't require the services of a live reservation agent.