congress plaza hotel3.5 out of 5 downtown chicago save 100% on your flight price was $770, price is now $488 per person $488 per person nov 21 - nov 28 found 1 day 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. the location is great, and the lobby is ornate, but the rooms have not been updated for decades , and i would expect more for the price. reviewed on oct 17, 2025