Everyone thinks the way US Airways has positioned its hubs is so weird!
Well, US Airways is not like other major airlines.
Part of the reason US AIRWAYS' Hubs are set up the way they are is because US AIRWAYS' is the product of many mergers and acqusitions.
But their hubs, which are all on the east coast are not really meant to connect traffic from the entire nation, they are meant to connect traffic across the east coast.
With hubs at Pittsburg, Philadelphia, Charlotte, and Mini hubs at Baltimore, Washington National, Boston, and La Guardia, (just to name a few) US AIRWAYS' has the strongest presence in the east than any other major airline.
With all their hubs and mini hubs US Airways offers 5,000 flights a day, and practically all their flights are all on the east coast! Airlines like AA and UA have many flights all over the world but only have between 2,000-3,000 flights a day. (These numbers include regional airline flights.)
US AIRWAYS IS THE NUMBER 0NE AIRLINE ON THE EAST COAST WITH THE MOST FLIGHTS AND THE MOST CONVEINENT SCHEDULES, and its all possible because US AIRWAYS' doesnt only have one or two majorly congested hubs in the east they have fortress hubs and hubs, and mini hubs all over the east coast!