Denver International Airport Automated Guideway Transit System Denver International Airport Automated Guideway Transit System The Denver International Airport Automated Guideway Transit System is a people mover system operating at Denver International Airport in Denver, Colorado. The system opened along with the airport itself in 1995, and was conceived as a means to connect all of the midfield concourses with the south terminal and quickly transport passengers between them because of the longer distances between each building, especially when compared to Stapleton International Airport, Denver's former airport. Located within the secure areas of the airport, the AGTS utilizes two mile-long tunnels traveling underneath the aircraft taxiways and passing
Stapleton International Airport Western began flights to Calgary. The Boeing 747 was introduced to Stapleton on Continental's Los Angeles route in 1970. In the early 1970s, Frontier occupied Concourse A, United occupied most of Concourse B, and Western and Continental occupied most of Concourse C. United and TWA served both coasts nonstop during this era, while Continental and Western's nonstop flights only extended to the western half of the country. Concourse D was built in 1972. After deregulation, Denver's four major incumbent airlines developed hubs at Stapleton. United occupied Concourse B, Continental and Western occupied Concourse C and Frontier occupied Concourse D. Western