Terminal 3 at Harry Reid International Airport (LAS) in Las Vegas is the primary terminal used by Frontier Airlines. The security check-ins at this terminal are designed to ensure that passengers have a quick and simple experience. Many TSA security checkpoints throughout the terminal help manage passenger flow, especially during peak hours. Travelers are advised to arrive at the airport at least two hours before to their departure in order to allow adequate time for security screening, which includes having personal belongings and carry-on items checked as well as passing through metal detectors or body scanners.