I don't believe it is very significant...Whether it is ATA or Airtran flying between Pittsburgh and Chicago...Fares on ATA were pretty low before with ATA and seems it didn't help them...USAIRWAYS as well as United & American serve Chicago, I believe...It will be good for the public, with that much competition to keep fares low to and from Chicago...Airtran is probably more of a threat between PIT and ATL with connections to more places....
A little considered threat to USAIRWAYS Pittsburgh flights I think is Southwest...But, with passengers driving to..... Cleveland for low fares, quick turn arounds and sadly reliability of flights departing on time....
Yikes!
