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O'Hare & Midway lead the list with the most cancellations & delays, according to FlightAware.com, an Internet-based website which tracks and monitors flight activity.
Accordingly, Southwest and United Airlines had the most delays & cancellations.
Wisconsin Air, a regional carrier for United Airlines, canceled the most flights by percentage out of any U.S. carrier on Sunday.
Patchy rain nearby, with a high of 93 and low of 73 degrees. Sunny for the morning, thundery outbreaks in nearby in the afternoon, partly cloudy for the evening, clear overnight.