DALLAS, TX - FEBRUARY 01: An airline passenger sleeps in Terminal D at DFW International Airport on February 1, 2011 in Dallas, Texas. A major ice storm hit the Dallas/Fort Worth area overnight days before Super Bowl XLV is to be be held in Arlington, Texas. (Photo by Tom Pennington/Getty Images)
Running late? So is Midway.
O'Hare wound up in 21st place with 73.9 percent.
Southwest Airlines, which ranked last nationwide for on-time arrivals among major domestic carriers, didn't help Midway's timing. But the airport is getting its act together.
January's 60 percent on-time flights is up from 49.9 in December.