Geneva is 4 hours ahead of Santiago
Best overlap: 8:00 AM to 2:00 PM in Santiago is 12:00 PM to 6:00 PM in Geneva.
Your window to reach both cities is 8:00 AM to 2:00 PM in Santiago, which converts to 12:00 PM to 6:00 PM in Geneva. A 6-hour overlap gives you real choice here — early or late in the window both work comfortably.