Ever get to the airport two hours early only to find out your flight is delayed by an hour? I think it's happened to all of us who travel even sporadically. It always seems to be the same old story..."the weather in Texas was bad causing your plane to be late arriving." According to this study, that is actually very RARELY the case. In fact, only 1% of the time a plane is late is it due to weather related problems. Almost 40% of the time it is due to a "systems delay!"