Airlines canceled hundreds of flights over the weekend as a snowstorm slammed the Midwest and moved toward Canada. Minnesota received more than 21 inches of snow in some areas, while wind and rain caused airlines to cancel flights along the East Coast. More than 1,400 flights were canceled out of Chicago over the weekend, and more cancellations and flight delays were expected. "This winter storm is obviously causing havoc with air travel through the upper Midwest," said Mary Frances Fagan, a spokeswoman for AMR. "Hundreds of flights have to be canceled for safety reasons."