Houston is 1 hour behind Ottawa
Best overlap: 9:00 AM to 6:00 PM in Ottawa is 8:00 AM to 5:00 PM in Houston.
Your window to reach both cities is 9:00 AM to 6:00 PM in Ottawa, which converts to 8:00 AM to 5:00 PM in Houston. You won't be short on options — 9 hours of overlap leaves space for recurring syncs and ad-hoc calls alike.