Air traffic controllers in Washington will manage the flow of planes into Chicago’s O’Hare International Airport, a move to help local controllers and clear congested skies, the Transportation Department announced. Transportation Secretary James H. Burnley IV announced the change one day after the Federal Aviation Administration reduced the number of departures and arrivals at O’Hare. This year, controllers at O’Hare have made 30 errors, more than twice the mistakes recorded in 1987. Four were made since last Friday. Under the plan announced late Thursday, controllers at the FAA’s Central Flow Control headquarters in Washington will monitor air traffic at O’Hare to enforce the limit of 155 departures and landings during daily peak hours.