As a major hub for the airline, George Bush Intercontinental Airport is home to United Airlines' main office in Houston. Customers can take care of a variety of needs at this office, including making travel plans, modifying existing ones, checking in for flights, United Airlines Houston Office and managing misplaced luggage. The office is located in Terminal C of the airport, which is used only for domestic and international flights operated by United. Being one of United's major hubs, IAH offers a wide range of services and connectivity to passengers. It is advised to get in touch with United Airlines customer support or stop by their Houston office during business hours if you have any specific questions.