Ottawa is 2 hours behind Santiago
Best overlap: 10:00 AM to 6:00 PM in Santiago is 8:00 AM to 4:00 PM in Ottawa.
The hours that work for both Santiago and Ottawa are 10:00 AM to 6:00 PM (Santiago) and 8:00 AM to 4:00 PM (Ottawa). An 8-hour overlap gives you real choice here — early or late in the window both work comfortably.