We fly in and out of Dulles often. Often we just get our kids to drive us to the airport and pick us up. (1 hour each way from Charles Town, WV). When schedules conflict we just pick up a rental car and drive it home, but then someone has to follow my DH back to the airport the next day and bring him home (a 2 hour chore). Since we go for 2 weeks at a time, it's still cheaper than paying $140 to park in the economy lot. (We often have free rental car days with National, so the rental car is always free.) Good luck. Dulles is pretty remote, but someone may chime in. We fly Jetblue exclusively now and love it! Maybe the rental car will work for you if you have someplace to pick one up in PA and drop off at the airport and do the reverse when you come home. Not sure where in PA you are coming from.