The percentage of flights arriving and departing on time dropped again in February at both O’Hare International and Midway airports, new federal data indicated Thursday.
At O’Hare in February, 60.73 percent of flights left on time, down from 63.09 percent in February 2013, according to the federal Bureau of Transportation Statistics.
However, other big-city airports showed declines in on-time departure rates, too, so O’Hare’s rank among them actually improved, going from dead last, or No. 29, in February 2013 to No. 27 in February 2014.
O’Hare showed the same pattern in arrivals. Its on-time arrival rate dropped from 66.57 percent to 65.18 percent between February 2013 and February 2014. However, its rank increased during that same period, from No. 29 to No. 26.
The increase in delay rates come even though officials said new O’Hare flight patterns instituted in mid-October were supposed to decrease delays in all kinds of weather.
Midway dropped in both rank and rates. Its on-time departure rate fell from 73.44, or No. 27, to 60.38, or No. 28, between February 2013 and February 2014.
For arrivals, Midway’s on-time rate tumbled from 82.67 percent to 69.19 percent between February 2013 and February 2014, dropping its rank from No. 10 to No. 22 .