The Tuesday incident at the Washington, DC, airport happened around 8:20 a.m. as American Airlines Flight 2246, en route from Boston, was preparing to land, the Federal Aviation Administration said.
Air traffic control instructed the American Airlines flight to perform a go-around to "ensure separation was maintained between this aircraft and a preceding departure from the same runway," the FAA told CNN.
A go-around is a routine maneuver that allows an aircraft to safely make an alternate landing "at the discretion of a pilot or at the request of an air traffic controller," the FAA said.
The plane that was preparing to take off was moving, but still on the runway, by the time Flight 2246 started its go-around, according to FlightRadar 24.
Flight 2246 eventually landed safely, and Tuesday's go-around was a standard maneuver "to allow another aircraft more time for takeoff," American Airlines told CNN Wednesday in an email.
"It's a tool in both the pilot's and air traffic controller's toolbox to help maintain safe and efficient flight operations, and any assertion that flight 2246's canceled approach was more than that is inaccurate," the airline's email reads.
The closest Flight 2246 came laterally to the departing plane before Flight 2246 turned and climbed was about 1.25 miles, and its lowest altitude before its climb was 450 feet, according to
FlightRadar 24.