Jacksonville is 1 hour ahead of Chicago. Jacksonville uses Eastern Time (EST/EDT) while Chicago uses Central Time (CST/CDT). When it's 12:00 PM in Jacksonville, it's 11:00 AM in Chicago.
Both cities observe daylight saving time on the same schedule, so the 1-hour difference remains constant year-round.
Best calling time: 10:00 AM - 6:00 PM Jacksonville time. This corresponds to 9:00 AM - 5:00 PM in Chicago, covering Chicago business hours.
Jacksonville and Chicago are connected by direct flights taking about 2.5 hours. Both are major port cities—Jacksonville for Atlantic shipping and Chicago as a Great Lakes hub.