LOL. Every flight I take has multiple schedule changes right up to the week before. However, I live in Saskatchewan and rely on AC to get me to a connecting airport for UA. What complicates things is that Saskatchewan doesn't change clocks in the Spring or Fall. I would have thought that it would be easy to program into the schedule but depending upon the time of year and the direction we fly, what was a reasonable connection at booking becomes unworkable and everything has to be rescheduled. Usually 2 or 3 times because AC seems to tweak things all the time.