There is no time difference between St. Louis and Chicago. Both cities use Central Time (CT, UTC-6/-5). When it's 12:00 PM in St. Louis, it's also 12:00 PM in Chicago.
Both cities observe daylight saving time on the same schedule, switching to Central Daylight Time (CDT) in spring and back to Central Standard Time (CST) in fall.
Any time works! Since both cities share the same timezone, you can schedule calls during standard business hours (9:00 AM - 5:00 PM) without any time conversion needed.
St. Louis and Chicago are both major Midwestern cities about 300 miles apart. Chicago is a global financial center, while St. Louis is known for healthcare, biotechnology, and as a regional corporate hub. Both are in the Central Time zone, facilitating easy business communication.