Based on the Airline Quality Rating (AQR) Report, which covers 18 domestic carriers, here is a list of the airlines that could stand to do the most work on making their customers happy. The report's conclusions are based on surveys of airline industry experts, with positive and negative values assigned to different elements in airline quality. Several common complaint areas were factored in -- including on-time arrival, mishandled baggage, delays and involuntary denied boardings -- the scores of which were then calculated to produce an overall quality score. We also took a look at a number of other sources, including the American Customer Satisfaction Index and the Air Travel Consumer Reports by the U.S. Department of Transportation. Regional airlines are ranked separately because of their tendency to score lower.
