Back in the day, mid-sized cities like Memphis, Kansas City and Pittsburgh were home to bustling airline hubs — crossroads of the country where millions of connecting passengers passed through each year.
Those days, however, are long gone.
As airlines consolidated and evolved their networks, these airports shifted from connecting points to purely origin-and-destination (O&D) gateways. In other words, they went from being major hubs facilitating connections to airports primarily serving travelers who actually live in or visit the area.
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