A secondary terminal known as the South Terminal is primarily used by ultra low-cost carriers Allegiant Air and Frontier Airlines. The South Terminal is accessed from a separate entrance on the south side of the airport perimeter from Burleson Road; it cannot be accessed from either the main airport entrance from SH 71 or the Barbara Jordan terminal except by completely exiting the airport grounds. A shuttle runs between the two terminals. The facility has a retro look and three passenger gates without airbridges—passengers walk under a covered walkway to board the aircraft by stairs.