If a traveller is planning to fly with Spirit Airlines in the near future, it is critical that they grasp the Spirit  Airlines  baggage policy and costs in order to avoid overspending. Spirit Airlines tickets, it should be noted, do not include luggage costs and have their own pricing system. In reality, as the departure date near, the luggage fees begin to rise.
https://blog.aircomodo.com/spirit-airlines-baggage-policy/