American Airlines and its regional subsidiary, Envoy Air, had the worst on-time-arrival rates of domestic airlines in August, with more than a quarter of their flights not arriving on time.
The Fort Worth-based airline posted an on-time rate of 73.2 percent, while Envoy was slightly worse, at 70.6 percent, according to a U.S. Transportation Department report released Thursday.
“We had several extremely challenging weather days that affected several hubs,” American spokeswoman Andrea Huguely said.
Overall, the largest domestic carriers reported an on-time rate of 77.7 percent, down from 78.8 percent in August 2013. Airlines also canceled more flights — about 1.2 percent of their schedule, up from 1 percent in the same month last year.
Envoy had the highest cancellation rate, at 3.8 percent of its August flights.
Hawaiian Airlines had the best on-time rate, at 94 percent. Southwest Airlines ranked 11th out of 14 airlines with an on-time rate of 75.3 percent.
There was one flight delayed on the tarmac longer than three hours. Republic Airways Flight 3497 was delayed for 183 minutes at Reagan National Airport near Washington, D.C., before departing for Columbus, Ohio.
Airlines also mishandled more luggage in August, posting a mishandled-bag rate of 3.69 reports per 1,000 passengers, up from 3.12 in August 2013. The Transportation Department also received 1,602 complaints about air service, an increase of 21.9 percent.