FatalitiesThe commonly used measurement for safest airlines is the number of fatalities per million miles traveled. In this ranking, according to a 2009 Consumer Warning Network article, Southwest comes first, having had no fatalities in its history. Delta comes in at .17, Northwest at .21, Continental at .24, US Airways at .28, United Airlines at .31, Alaska Airlines at .33, and American Airlines at .40.
In August 2009, The Daily Beast measured fatalities per million take-offs, in order to weigh some of the smaller airlines in the study. They came up with AirTran being the safest airline, followed by JetBlue, Southwest, and US Airways.