Originally Posted by
bitburgr
How far back in the history of the old US did PHL become a hub? Was it before PIT? Were they identified as hubs around the same time? Or was PIT truly a hub before PHL?
US began building up PHL in the early 90's and by the middish 90's PHL was a hub, along with PIT. The PIT reductions started in earnest during BK1.
Jim