Buenos Aires and Santiago are typically in the same timezone or 1 hour apart. Buenos Aires uses Argentina Time (ART, UTC-3) while Santiago uses Chile Time (CLT, UTC-4 or CLST, UTC-3). When Chile observes daylight saving time, both cities are synchronized.
The time difference varies between 0-1 hours throughout the year depending on Chile's daylight saving time schedule.
Any business hour works! With minimal time difference, scheduling calls during standard business hours (9:00 AM - 6:00 PM) in either city provides excellent overlap.
Buenos Aires and Santiago are neighboring capitals separated by the Andes mountains. Direct flights take approximately 2 hours. Both cities are major economic centers in South America.