The U.S. Department of Transportation has released the scorecard for airlines' on-time performance in August, and it turns out they did a pokier job of it than in the same month of the previous year.
Nearly one in four domestic flights were late in August, while 77.6% of them arrived on time, down from 80.3% in 2015.
Hawaiian Airlines had the best on-time rate (nice weather helped). Frontier and Spirit had the worst. Among the four biggest carriers, punctuality went in this order: Delta, Southwest, United, American.
Twenty times that month, planes with passengers aboard sat on the ground beyond the legal limit (three hours for domestic flights, four for international). Those incidents are being investigated and could result in fines for the airlines responsible.