Denny's 737 W Hwy 50 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM 6:00 AM - 11:00 PM737 W Hwy 50 O'fallon, IL 62269 US