As you can see from the following snippet from Air Canada’s current timetable, the daily flight from Charlottetown to Toronto mysteriously starts taking 4 minutes longer as of July 2, 2002:
I wonder if this has to do with practical matters like a gate being available in Toronto, or with matters beyond their control like a subtle shift in the prevailing winds. Any pilots in the audience?
Could be a change in equipment (aircraft that is), and thus a different cruising speed at altitude. A pilot’s possible explanation. Or it could be four more minutes of imprisonment, to get rid of the last package of stale nuts! A frequent flyer’s possible explanation.