Flying JFK to PHL with DL in F and connecting on separate ticket to DOH with QR in J. My DL flights arrive at 17:02 and in the DL app it shows a 100% on time performance. My QR flight is scheduled for departure at 20:55. So about 4 hours connection time. I have a lot of luggages, does PHL have luggage cart which I can use for the landslide terminal transfer? I assume with my DL F class ticket my baggage should be priority tagged and I should be fine with 4 hours. Any concerns or recommendations?