Wondering What Terminal is Lufthansa Airlines at IAH? Lufthansa operates from Terminal D at George Bush Intercontinental Airport. This terminal handles all Lufthansa departures and arrivals, offering modern amenities, efficient check-in services, and easy access to customs and immigration. Terminal D is designed for international travel, providing a seamless airport experience for Lufthansa passengers. Whether you’re departing or arriving, Lufthansa Airlines ensures a smooth journey.