A report found there have been at least 241 reports of close encounters between unmanned aerial vehicles and manned aircraft.
The report is based on an analysis of government records detailing 921 incidents involving drones and manned aircraft between Dec. 17, 2013, and Sept. 12, 2015.
Two aircraft must fly within 500 feet of each to meet the Federal Aviation Administration's definition of a near midair collision.
Ninety of the close encounters involved drones and commercial jets, the majority of which had the capacity to carry 50 people or more.
The majority of the incidents, 64.5%, were sightings of drones in the vicinity of other aircraft with no immediate threat of collision.
The locations with the most incidents were:
- New York/Newark, N.J., 86;
- Los Angeles, 39; Miami, 24;
- Chicago, 20;
- Boston, 20;
- San Jose, Calif., 19;
- Washington, 19;
- Atlanta, 17;
- Seattle, 17;
- San Diego, 14;
- Orlando, Fla., 13;
- Houston, 12;
- Portland, Ore., 12;
- Dallas/Fort Worth, Texas, 11,; and
- Denver, 10.
Source: Chicago Tribune