The check-in process is relatively fast for those who check in online or use the Spirit app. However, if you need assistance or are checking bags, give yourself some buffer time. Spirit is known for its budget-friendly fares but also for strict policies on luggage weight, size, and fees—so ensure your bags comply with their limits to avoid delays or extra costs. https://airportsterminalhub.com/airlines/spirit-airlines/spirit-airlines-harry-reid-international-airport-las-terminal/