Situated in Las Vegas, Nevada, Frontier Airlines Harry Reid Airport Terminal is a busy hub that links tourists from all over the world to the world's entertainment capital and beyond. Operating out of Terminal 3 (T3) at Harry Reid Airport, Frontier Airlines is a well-known low-cost airline that offers both domestic and a few international flights at affordable prices. This is a thorough reference to all you need to know about Frontier Airlines at Terminal 3 at Harry Reid Airport.