To avoid possible delays on the Henri Coanda Intl. Airport (OTP) to Eastmain, QC (ZEM-Eastmain River) route, travel before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.