Last updated on August 24th, 2022 at 05:32 amOne of the two biggest ultra-low-cost carriers in the USA, Allegiant Air transports on average 15 million passengers on its scheduled flights annually. Since Allegiant Air is an LCC airline, it regularly launches the cheapest possible flight deals to some of the most exciting destinations throughout the United States. Are you looking to make a budget-friendly trip anytime soon? Score the cheapest flight deals available with the help of the Allegiant Low…