Turkish Airlines doesn't have a separate walk-in office in Miami rather, their services are handled at Miami International Airport (MIA), specifically in Concourse J (South Terminal), where you'll find their ticketing, check-in, and their airport lounge (also in Central Terminal E after security) for passenger assistance and flight-related needs. For general inquiries or booking changes, use the Turkish Airlines website, app, or their dedicated contact center before heading to the airport, as specific desk hours can vary.