Spygrrl, your name and email address look familiar to me...have we met in Chicago?
Anyway, Southwest has some pretty good fares out of Midway. Also if the cities/dates are not critical no pressing schedule or commitments) the e-fares on United and AA are a good deal. Short notice, but low cost. You might want to register at each site,
www.ua.com and
www.aa.com to get added to the emailing list.