When Holly is talking to Oscar about the possibility of flying back for a visit instead of driving, Oscar says he doesn't know if it will be shorter to fly since she will have to drive an hour and a half to Boston, fly to Philadelphia, and then drive two and a half hours to Scranton. Boston is only fifteen minutes from Nashua and Scranton has it's own airport (Wilkes-Barre International Airport as seen in episode 508) that she could have easily flown to from Boston.