But, O'Hare came in at 28th, with just over 76 percent of flights arriving on-time.
The best airport for on time arrivals was Salt Lake City. The worst: New York's JFK.
For departures, Midway ranked 13th, with just over 88 percent of flights taking off on time. O'Hare came in last, with less than 79 percent of flights leaving as scheduled. Again, the best airport was Salt Lake City.