Frontier Airlines LAS Terminal At Las Vegas McCarran International Airport (formerly Harry Reid International Airport), Frontier Airlines is based in Terminal 1. This airport is well-known for its practical design, offering a variety of dining and shopping alternatives to suit the needs of low-cost visitors. The process is simple and easy to navigate because to Frontier's strategically placed check-in counters and gates. Visitors should anticipate a simplified process with friendly employees and obvious signage. To ensure a hassle-free start to your trip, the terminal also provides a number of amenities to make waiting hours more comfortable.