Wondering What Terminal is Lufthansa Airlines at IAH? Lufthansa Airlines operates from Terminal D at George Bush Intercontinental Airport. This terminal is known for handling international carriers and offers a range of services for departing and arriving passengers. Lufthansa travelers can expect efficient check-in, security, and boarding processes at this terminal. Terminal D also features lounges, dining options, and comfortable waiting areas. For a smooth experience, it’s best to arrive early and double-check terminal information before your flight.