Mumbai is 10.5-11.5 hours ahead of Chicago. Mumbai uses Indian Standard Time (IST, UTC+5:30) while Chicago uses Central Time (CST/CDT, UTC-6/-5). During standard time, Mumbai is 11.5 hours ahead; during daylight saving time, Mumbai is 10.5 hours ahead.
India does not observe daylight saving time, while the US does, so the difference varies seasonally.
Best calling time: 7:30 PM - 11:30 PM Mumbai time. This corresponds to 9:00 AM - 1:00 PM in Chicago during standard time, covering morning business hours.
Mumbai and Chicago are both major business centers. Chicago has a significant Indian-American community, and both cities have strong ties in technology, finance, and consulting. Direct flights take about 16 hours.