American Airlines hasn't canceled any of its 31 daily flights in Boston. The airline is allowing passengers scheduled to fly today to rebook onto flights Saturday or Sunday without penalty, according to spokeswoman Andrea Huguely.
The Federal Aviation Administration imposed an air traffic restriction on the Boston area "to provide a safe environment for law enforcement activities." It bars flights below 3,000 feet in a radius of 3.5 miles around the manhunt area. Such restrictions have minimal impact on commercial flights in the area.