Eighty-five percent of flights out of O'Hare and 76% out of Midway departed on time in December 2023, per the latest Transportation Department data.
The big picture: More than 83% of domestic U.S. flights departed on time in December 2023.
That's a significant upswing compared with December 2022, when Southwest Airlines' epic meltdown dragged the industry average down to about 70% for the month.
Florida's Destin-Fort Walton BeachAirport was the most on-time (89.5%), and Fort Lauderdale/Hollywood International Airport was the worst (67.2%).