About 46 million flights canceled , About 46 million delayed , US Airways Express reports . over 4,600 people expected to travel for holiday , the most since the holiday . East Coast travelers get hit by snow . Airlines waive rebooking charges for travelers .
735 flights canceled , over 4,600 delayed , FlightAware.com reports . About 46 million people expected to travel for holiday , the most since 2007 . East Coast travelers get hit by snow . Airlines waive rebooking charges for travelers .