When flying with Allegiant Air through Las Vegas, it's important to know [what terminal is Allegiant in Las Vegas](https://airlinesairportterminals.com/allegiant-air/allegiant-air-harry-reid-international-airport-las-terminal/) to ensure a smooth and stress-free airport experience. Allegiant Air operates out of Terminal 1 at Harry Reid International Airport, which is the primary terminal for many domestic carriers. This terminal is well-equipped with a variety of amenities, including dining options, retail shops, and accessible transportation services. Passengers traveling with Allegiant should proceed to the Ticketing and Check-In area in Terminal 1, where they can complete the check-in process, drop off luggage, and proceed through security screening. After clearing security, travelers will access the D Gates, which are connected via a tram system from the main terminal building. Understanding what terminal is Allegiant in Las Vegas is especially helpful during busy travel periods, as it allows ample time for navigating the airport layout and locating the correct gate. Whether arriving or departing, being informed about Allegiant’s terminal location at LAS contributes to a more organized and relaxed journey.