congress plaza hotel3.5 out of 5 downtown chicago save 100% on your flight price was $335, price is now $235 per person $235 per person dec 6 - dec 9 found 13 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. could use more front desk staff. quite a line formed behind me reviewed on sep 18, 2025