https://www.bark.com/en/us/company/spirit-airlines-check-in-policy-/MoZBA/
Travellers flying with Spirit Airlines can check in online up to 24 hours ahead of time. An hour before to the departure time of the flight, online check-in closes. Passengers have the option to buy luggage or a seat at their online check-in. Boarding passes are available for printing or downloading to a mobile device after check-in is finished.
Spirit Airlines charges $25 to print a boarding card at the airport, so checkin
