I recently came across a nifty little tool for helping compare flight tardiness amongst the airlines in Canada. This web app allows you to view the percentage of times that certain airlines are late between two destinations. While their interactive map lacks some cities in Canada, it provides a good overview, which is great for anyone concerned with arriving late to a wedding, a funeral, or the start of a vacation.
http://www.the10and3.com/stuck-at-the-gate-which-canadian-airlines-will-get-you-there-on-time/
http://www.the10and3.com/stuck-at-the-gate-which-canadian-airlines-will-get-you-there-on-time/