Spirit Airlines is an ultra-low-cost airline based in Dania Beach, Florida in the greater Miami area. It operates domestic flights throughout the United States as well as to mostly leisure destinations in the Caribbean and Latin America. Fort Lauderdale-Hollywood International Airport(FLL) is one of the primary hubs for Spirit and is one of the few large airports where it has the largest share of the market. All the busiest Spirit flights from Fort Lauderdale are to other destinations within the US. Here is what to know about Spirit’s busiest flights from Fort Lauderdale, according to Cirium, an aviation analytics company.