Austin’s airport has been one of the fastest growing in the country for several years. Their main terminal needs to grow to accommodate this – at peak times passengers are packed in so tight it’s barely possible to move. Gates are in constant use with no real room for more flights, either.
One way the city-controlled airport planned to manage growth was with a separate ‘South Terminal’ for low cost carriers. They leased space to a private company for 40 years, which built the terminal, and has been housing Allegiant and Frontier. The terminal is just six years old, but the airport changed its mind.