Spirit Airlines MSP Terminal +1-888-839-0502 Visitors using Spirit Airlines MSP Terminal has three choices when check in: on the internet, using the airline's mobile app, or at the manned counters or self-service kiosks in Terminal 1. Visitors must verify baggage dimensions to avoid extra charges caused by strict luggage restrictions. TSA is in responsibility of airport security screening, and in want to ensure a simple trip, it is advised to get there early (at least two hours before domestic flights and three hours before international flights).