The distance from Collingwood to Ajax is approximately 150 kilometers. You will travel south on Highway 400 and then east on Highway 401. This route takes you through the northern suburbs of the Greater Toronto Area. Travel time is usually around 2 hours. Traffic can be heavy near the Highway 400 and 401 junction.
Total Distance: 150 km driving distance; 120 km straight-line air distance.
Consider the 407 ETR if you want to avoid the 401 traffic.
Travel during mid-morning to avoid the worst of the GTA rush hour.