Junior base is highly variable depending on when you enter class and luck. Safe to say NYC is a common 145 base right now. But ORD is possible, and a transfer to DFW is also possible at some point. 145 reserve in ORD is shorter than in DFW right now. Others could speak to specific times, but they are also highly variable depending on your class date. At the moment, DFW folks have a fairly long wait on the 145. That could change rapidly.

The 175 is only in DFW -- there is no 175 ORD base. Reserve is short, a few weeks right now, but that could go back up as hiring is now spread out amongst aircraft, as opposed to full classes of 175 hires.