Below, we offer users a way of viewing their favorite common routes and just how much, if at all, the airlines are taking liberties in building wiggle room into their scheduling. Upon clicking just one origin airport, users can see how these trends occur for all outgoing flights. If a second destination airport is selected, the data is narrowed down to the average estimated time and average actual time through the years. The data overwhelmingly illustrate the danger in immediately believing that delays are going down — even if they are nominally, that does not mean that the flights are more consistently arriving at a set time. Instead, a flight will now be estimated much more generously, giving airlines room to maneuver while still reporting “on-time” to the Bureau of Transportation Statistics.