Frontier Airlines Las Vegas Terminal operates out of Terminal 3 (T3) at McCarran International Airport in Las Vegas. Terminal 3, also known as the "E Gates," primarily handles international flights but also serves some domestic airlines, including Frontier Airlines.

When flying with Frontier Airlines from Las Vegas, you would need to check-in, go through security, and access the departure gates within Terminal 3. The terminal offers various amenities and services to enhance the travel experience, such as retail shops, restaurants, and passenger lounges.

As terminal assignments can occasionally change, it's always a good idea to verify the terminal information for your specific flight with Frontier Airlines or check the airport's website for the most up-to-date details prior to your departure.