A new study says Atlantic City Airport is the best place to find a deal. The airport has the lowest fares among the top 100 airports in the country. ACY has been helped in this category because its only major airline is Spirit Airlines, which focuses mostly on Florida flights and cheaper tickets to compete with Philadelphia. Spirit Airlines uses a model of lower ticket prices but charging fees in order to make up the additional revenue. United Airlines will be flying out of the airport beginning in April.