Can I leave Miami International Airport on a layover and see Miami?
Often, if the window is long enough. The deciding part is the airport at both ends, not the drive: leaving means going back through security for the next flight, and some connections mean collecting and re-checking bags. Your airline sets those minimums, so start from them rather than from the map.
Miami International sits about a dozen miles inland from the beach. On a clear run it's a short drive to Brickell or Downtown and a little longer across the causeways to South Beach; at rush hour or during a major event, plan for more. A private chauffeur meets you inside arrivals, watches your flight for delays, and handles the bags, so the airport is the easy part of the trip rather than the first hurdle.
If the airport time is covered and about four hours are left, a short plan works well: a 4-hour afternoon: Wynwood to the Design District.
Book it by the hour from the terminal. The chauffeur meets you inside arrivals, tracks the inbound flight, and keeps the clock on the way back to departures. If the connection is tight, the honest advice is to stay airside.
Reserve a car in Miami
One chauffeur, a price set before the car moves, and a concierge who answers. No app, no meter.
4 hours in a sedan start at $648, 20% service charge included, with 80 miles covered. The concierge confirms the fare before the car moves.