The place where PZ is set is under quarantine, if you were to use a helicopter, you would probably just get shot down by the military anyway. In all modes of PZ there is quarantine? I thought it's only in Kate&Baldspot story. I think there is no reason to have helicopter. You must be pilot to use it and you can't figure it out by yourself. It's just too complicated / complex. It would be overpowered or useless. Not so good idea in my opinion. On the other hand maybe paraglider could be a thing? I don't know how common are they in USA but in my country it's common thing to see on sky. It's not so complicated to use / fix it. I dont see how you would even use a paraglider, because 1: You can't go up, you can only glide down. 2: To begin using them, You'd need to be higher up, and since there are no mountains or hills, you'd have to use rooftops, to which you have no way to transport the glider to. Also, it's the same place as the Kate&Baldspot story, so naturally it is under the same circumstances, so yes, it is under quarantine.