I heard that Pittsburgh to Amsterdam service is starting up soon with Northwest/KLM. Just a quick fact.|||I doubt either would right now. Southwest operates some flights out of Philadelphia but US Airways currently operates the most flights out of PIT. PIT used to be a hub city for US Airways but has become now a focus city. It seems as though there are not that many people to fly to Pittsburgh or fly out of Pittsburgh. It seems most passengers only connect there. Therefore the airlines may not see Pittsburgh as a good market to make it their hub.

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