Hyatt Regency O'Hare Int'l Airport (Chicago Vicinity) - Rates from $79 Per Night!
"CHRISTMAS IN JULY 48 HOUR FLASH SALE"
Reduced rate - Full prepayment at time of booking - Non refundable"
The sale rates start at $79.00 per night for select dates in October! You can book this deal on a variety of sites: Expedia, Hyatt, Booking.com and others.
Use this link to check your dates, book, and read this Hyatt's reviews.
Sample dates (there are probably a few others):
10/2, 10/9, 10/10, 10/16, 10/24, 10/30, 10/31