For international-to-anywhere airport transits in the US for those travelers without priority immigration/customs access and priority screening access at US airports, two-hour scheduled connections are too often a gamble at all the major US TATL gateways (when coming in from non-CBP Preclearance airports) because of US DHS for immigration/customs and airport security screening times.
Thanks. If we check bags and get all our boarding passes in Atlanta when we check in with AA, would we have to check in again with QR at T5 or could we just hop off the train and go through security?
If AA@ATL tags your bags as checked in to your final destination on QR and you have your ORD-DOH QR boarding passes issued before you get to the ORD T5 screening checkpoints, then at ORD you can just go straight over to whichever open T5 security screening checkpoint you pick to go back airside at T5 after you arrive at ORD. If you're extra-worried about your luggage making your QR flight out of ORD, you can ask the gate-agents for the QR flight about the status of your bags by showing them the checked baggage tags you are given by AA showing that the bags are thru-checked onto your QR flight(s).