The move is likely to have an outsized impact at O’Hare Airport. More than half of the airport’s daily domestic departures are on 50-seat jets, and the majority of those are operated by Chicago-based United.

http://www.chicagobusiness.com/article/20140809/ISSUE01/308099981/uniteds-move-to-drop-small-jets-will-have-a-big-impact-at-ohare?r=8131B4604801F5R