Hey--same as everyone else. Fly into Pittsburgh. But honestly, for those of you who cannot spell Pittsburgh, please learn how (especially those who interviewed/have interviews there).
Anyway, yeah Morgantown is 60 miles south of Pittsburgh airport, but your driving distance will be about 70-80 miles and take you probably 1.5 hours depending on the time of day and construction (check the PennDOT website to make sure because I-79 has a bunch of construction going on, although I think they are mainly done with the sections you'll need). I drove down at 7:30 AM the morning of my interview (since WVU interviews start so late) and I still got there way early. If you don't care to check out the city of Morgantown (it's a charming place) too much, you can save money on hotels and fly into Pittsburgh in the early morning and leave that evening. They ask at the beginning of the interview who needs to be back to Pittsburgh for an evening flight, and then they arrange the afternoon interviews accordingly. I was the second to last interview and still was done and out of Morgantown by about 2:30 PM.
Also, it's really easy to drive from the Pittsburgh airport to Morgantown. Just exit the airport, take RT 60 S, then take 22-30 E, then I-79 S and then follow the directions on your interview info to WVU from the North. And it's a beautiful drive!
Good luck on your interview!