Originally Posted by
3Cforme
AA ORD-EWR is all CR7 tomorrow, just as it is for ORD-ATL. United ORD-EWR is a mix of mainline and E70. There are lots of ~60-76-passenger regional jets operating between even the biggest U.S. airports.
You'll find on hub-hub routes operating by a competitor that has hubs in both airports that the competition often uses regional jets.
E.g., AA ORD-DEN, ORD-EWR, ORD-IAH.
E.g., UA ORD-DFW, ORD-MIA
E.g., DL LGA-ORD
AA's service and schedule on the ORD-LGA route (more important for business traffic between the two cities) is definitely the winner vs. UA and DL.