If you get on a Spirit Airlines flight, there's a 50-50 chance that your flight will be late.
Spirit, a low-fare carrier with a clientele of mostly leisure travelers, had by far the worst on-time performance in June among 14 airlines tracked in a government report. Only 49.9 percent of its flights arrived within 15 minutes of schedule, which is the government's definition of being on time.
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United Airlines had the second-worst rating, at 66.3 percent on time.
Overall, airlines covered by the U.S. Department of Transportation report operated 74.8 percent of their flights on time in June, up from 71.8 percent in June 2014. Hawaiian Airlines, which benefits from many short flights in mostly good weather, finished on top, with 90.5 percent of its flights landing on time.