United Airlines operates in several terminals at George Bush Intercontinental Airport (IAH) including Terminal A, B, C, D, and E. The United Clubs are located in Terminal A near Gate A9, Terminal B on the Mezzanine Level, Terminal C near Gates C1 and C33, and Terminal E near Gates. United Airlines operates exclusively in Terminal E for domestic and international flights, and ticketing/check-in is on level 1 along with a. United reserves its Terminal C North checkpoint for TSA Pre✓™, Premier. All the terminals at IAH are connected.