Spirit Airlines operates in Terminal 1 at Harry Reid International Airport in Las Vegas to take a budget-friendly approach to travel to many different places across the United States and internationally. Spirit Airlines Harry Reid International Airport  ultra-low-cost business model makes Spirit Airlines offer low base fares while allowing customers to pay for services such as seat selection, carry-on bags, checked luggage, and in-flight refreshments. This approach keeps the initial ticket prices low but allows passengers to customize their travel experience by adding only the services they need.