American Eagle Airlines (Dallas/Fort Worth) continues to build up the Chicago O’Hare hub. The carrier will add the ORD-Sioux Falls route with Embraer ERJ 145s on April 6, 2010. Eagle will also add seasonal service from ORD to Rapid City (gateway to the Black Hills and Mount Rushmore) with Embraer ERJ 140s on June 10, 2010.

Press release:

finance.yahoo.com/news/American-Eagle-Airlines-prnews-555081750.html?x=0&.v=1