We saw this promotion on US Airways' web site, touting new fares to St. Petersburg, FL. Maybe you did too, and wondered, gee, is US Air flying to PIE (the airport's official three letter code) now? That would be big news, and it was dubiously reported by some other airfare deals sites.
In fact, US Air only flies to nearby Tampa, near as we can make out. The only airline we know of that flies into PIE is Allegiant. Feel free to correct us if we're wrong.