I lived in MKE for a few years and only recently moved east. I probably flew almost every other week to DFW on the MD-80. They started putting in the occasional A319 or even E175 on the weekends, but still had 2 or 3 MD-80s daily. Summers are quite nice in MKE, plus the festivals and beer galore. The Brewers aren't half bad either if you're a baseball fan. You could easily fill a few days if you're looking for a quick trip.