The flights of United Airlines are mainly held in Terminal C and Terminal E at George Bush United Airlines IAH Terminal Intercontinental Airport (IAH) in Houston. Terminal C is used mainly for domestic operations, while most international departures and arrivals use Terminal E. United also holds access to Terminal B for the regional United Express flights. It is connected between the gates of the terminals with the Skyway train for transferring passengers. United passengers at IAH can take advantage of United Club lounges, dining options, and security checkpoints that get them through security quickly, making it a major hub for the airline's extensive domestic and international network.