Originally Posted by
highfarfast
It's possible to get there with a 3D as well if he's junior enough in Dallas to get displaced from an upgrading FO but senior enough to hold it in Chicago. He didn't say exactly how junior he was (I'm not going to study the seniority list to figure out where a junior lineholder in ORD falls in DFW) which is why I told him 3P and 3D. It's certainly what I'd do if I were him.
My point of preference vs displacement is that if already in captain status on a 145, there is no training lock involved or override to be gained, so no reason not to preference.