The Federal Aviation Administration said the plane, a Cessna 172, departed Danbury Municipal Airport around 8:30 a.m. and crashed about an hour later in a grassy area a quarter-mile from the New Milford runway.
The student pilot, a juvenile female whose name has been withheld, needed to be extricated from the plane by the New Milford Fire Department, police said in a release Saturday.
The third person on the plane was 44-year-old Peter Jellen, of New York, who was seriously injured but able to walk from the crash to a nearby home and call for help, police said.