America's Worst Weather-Delayed Airports

From Aug. 2013 to July 2014, nearly 23 percent of U.S. flights arrived at least 15 minutes late, were cancelled or diverted, according to U.S. Department of Transportation statistics. That amounted to roughly 1.4 million delayed, cancelled or diverted flights over the 12-month period.

Of all late-arriving flights, roughly 31 percent, or 391,000, were due to weather, according to the U.S. DOT. Since 2004, weather has been responsible for one-third to one-half of all delays annually.

More details here.