Tucuman doesn't observe daylight saving time but Chicago does. DST in Chicago started on 10 March 2019 and will end on 03 November 2019. Once DST ends in Chicago the time difference between Tucuman and Chicago will be -3:0 hours.
Time zone: ART - Argentina Time (UTC/GMT -3)Time zone difference / Flight distance
Time zone: CDT - Central Daylight Time (UTC/GMT -5)DST started on 10 March 2019DST will end on 03 November 2019Time zone difference / Flight distance