What Terminal is Southwest Airlines at LAS? Terminal 1 of Harry Reid International Airport (LAS) in Las Vegas is home to Southwest Airlines. Southwest Airlines' check-in desks are ideally situated in the main terminal building, guaranteeing easy baggage drop-off and boarding. Terminal 1 has a range of services, such as dining options, retail establishments, and pleasant seating areas for passengers. Southwest's gates are easily accessible from the A and B concourses, which are well-connected throughout the terminal. Passengers are recommended to come early and use Southwest Airlines' mobile check-in services to ensure a smooth journey. 
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