As of 2015, Allegiant Air offers specials on its website, AllegiantAir.com. This airline provides specials based on the customer's home airport. From the main page of the airline's website, click on the button near the top of the page titled Deals.
On the new page, use the drop-down menu to select the home airport in the city from which you want to depart when traveling. After selecting the home airport, click the button marked Get Offers. A list of special deals for flying to specific cities is shown. To use the special, click Book Now and begin the reservation process.