Alaska Airlines operates from Terminal 3 at Harry Reid International Airport (LAS) in Las Vegas, which is modern and easy to navigate, housing most of the major airlines' flights. Whenever you fly Alaska, you will typically be checking in, going through security, and boarding your plane all in Terminal 3, although there may be occasions when the flight operated by a partner would require you to go to Terminal 1. Therefore, it is helpful to check your flight details ahead of time to know where to go to avoid any confusion when you arrive at the airport.


