Aircraft are part of GTA's content. Airports are how players access them. We aggregate the airport situation across the map here.
The Vice City airport
The major airport - Miami International analogue. Covered on the Vice City airport page. Multi-runway, terminal-and-aprons, plausibly the launch point for the bigger aircraft.
Smaller regional airports
Plausible. Florida has multiple regional airports; Leonida likely does too. None confirmed in trailer material at the time of writing.
Smaller airports would probably hold smaller aircraft - private planes, helicopters - and might be tied to side content like air races or smuggling.