Passengers on What Terminal is Alaska Airlines at LAS  find it easy to navigate Harry Reid International Airport's Terminal 3. Following check-in, passengers move through efficient security checkpoints with multiple lanes to handle huge volumes of passengers. For those who qualify, TSA PreCheck lanes are available, which significantly cuts down on wait times. Passengers on Alaska Airlines will discover gates with digital displays clearly marking their flight information after passing through security. Travelers may easily unwind before boarding their aircraft thanks to the terminal's design, which guarantees that there are short walking distances between the dining, security, and gate sections.