Information on the relative level (by hour) of how busy each terminal is at Toronto YYZ based on data from the past two weeks:
https://www.torontopearson.com/en/status
Some recent stats for YYZ, according to Deborah Flint, President and CEO of the Greater Toronto Airports Authority (GTAA)
- 82% of passengers last week cleared security in less than 15 minutes (a one percentage point increase over the rolling average for the previous four weeks)
- Last week, 44 per cent of all flights were on time, versus a 35 per cent average for the four previous weeks.
- At times, the airport is forced to hold passengers on their plane to make room in the customs hall. This happened 19 times last week, an improvement from a four-week rolling average of 60 plane holds per week.
- Baggage: For domestic travel, the average wait time for bags to arrive at the carousel is now 24 minutes, a three-minute improvement over the four-week average. The same metric also improved by three minutes for international bags, and by four minutes for transborder bags.
Busiest times at YYZ (avoid if possible):
Departures
Terminal 1, domestic departures: 5 AM to 7 AM
Terminal 1, international departures: 5 AM to 7 AM, 3 PM to 7 PM, and 10 PM
Terminal 1, United States departures: 5 AM to 9 AM, 2 PM to 5 PM
Terminal 3, domestic / international departures: 4 AM to 6 AM, 2 PM to 3 PM, and 6 PM to 9 PM
Terminal 3, international departures: 6 PM to 8 PM
Terminal 3, United States departures: 4 AM to 5 AM, 8 AM to 9 AM
Arrivals
Terminal 1, arrivals: 3 PM to 6 PM
Terminal 3, arrivals: 4 PM to 6 PM
--