Operating out of Las Vegas McCarran International Airport's Terminal 3, is Frontier Airlines LAS Terminal With sophisticated security screening, numerous amenities, and quick check-in desks on Level 2, this contemporary terminal provides a flawless travel experience. There are several food options, retail stores, and free Wi-Fi available to passengers all across the terminal. Although Frontier lacks a dedicated lounge, travelers can enjoy a nice pre-flight experience at The Club LAS Lounge.