The Opera Hound
For summer operas in Chicago, consider Chicago Summer Opera

I just added Chicago Summer Opera to the roster of companies on the OperaHound calendar. They are performing five different productions this summer:
The Magic Flute (Mozart) - July 18-19
Rinaldo (Handel) - August 18-19
The Turn of the Screw (Britten) - August 22-23
The Beautiful Bridegroom (Shore) & A Game of Chance (Barab) - July 14
Riders to the Sea (Williams) & La voix humaine (Poulenc) - August 13