Welcome to the Days Inn O'Fallon Illinois. Complimentary Continental Breakfast with Hot Dish Close to all St. Louis Area Attractions, 10 miles from Gateway International Racetrack, Restaurants, Theaters, and Malls and shops. We offer our guests an Indoor Heated Pool, Exercise Room, Complimentary High Speed Wireless Internet in all rooms, and easy access to Interstate. Excellent customer service, courteous and friendly employees who are committed to ensuring customer satisfaction. Pet friendly Hotel for nominal fee.