Although Spirit Airlines FLL Terminal has both domestic and international services out of Terminal 4, commonly referred to as the "International Terminal," this terminal is mainly utilized for foreign flights. Because to Spirit's vast network from FLL, this terminal is one of the busiest areas of the airport. In order to better serve the growing number of travelers, Terminal 4 has undergone extensions and modifications, providing more services that are convenient for passengers.
Concourse G, which serves both domestic and international flights, and Concourse H, which is mainly used for foreign flights, make up the terminal. Spirit Airlines' gates and services are located in Concourse G, where it mostly operates.