United Airlines is one of the most significant airlines at Harry Reid International Airport (LAS), Las Vegas. United Airlines Harry Reid International Airport offers its services to millions of passengers every year. This airport happens to be one of the busiest in the United States, as it caters to the lively entertainment, tourism, and business activities happening in the city. United Airlines is a significant contributor to this traffic with its wide network of domestic and international flights connecting Las Vegas to cities across the United States and the world.