JetGreen flies three airplanes, using a “hub-and-spoke” flight schedule between Houston and three cities, Chicago, Miami, and Phoenix. These three cities are the “spokes” connected by the Houston “hub.” Once each day, the three airplanes fly from the spoke cities to Houston.
They arrive nearly simultaneously at Houston, then connecting passengers change aircraft during a 1-hour layover, and the three airplanes return to their starting cities. One set of six flights (3 inbound to Houston and 3 outbound) is called a bank. A bank can serve passengers flying on 12 different routes: three inbound direct routes (Chicago or Miami or Phoenix
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