congress plaza hotel3.5 out of 5 downtown chicago price was $454, price is now $333 per person $333 per person dec 18 - dec 21 found 17 hours ago roundtrip flight included atlanta (atl) to chicago (ord) book a stay at this business-friendly hotel in chicago. enjoy free wifi, 2 restaurants, and 2 bars/lounges. our guests praise the helpful staff and the clean rooms in our reviews. popular attractions grant park and millennium park are located nearby. i read from reviews that the congress plaza was in an excellent location which i completely agree. they have made room improvements and our rooms were very clean. but two things that need to be improved: the mattresses are too firm, maybe add a soft pillow topper so something. did not sleep well. the second improvement needed is climate control - all we could do is adjust the fan speed of the unit under the window. there was no way to adjust the temperature. reviewed on oct 5, 2025