United Airlines' on-time performance continued to improve in August, with 73% of flights arriving as scheduled, according to the Bureau of Transportation Statistics.
United improved to 15th place among the top 19 U.S. airlines, up from 17th in July and 18th in June. On average, U.S. airlines had an on-time performance rate of 78% in August, the most recent data available.
American Airlines, the second-largest carrier at O'Hare International Airport behind United, slipped to 17th place, BTS said. Its flights arrived as scheduled 71% of the time.