A statement by the Civil Aeronautics agency said the conclusion was based on the plane's black boxes and other evidence. It said the evidence points to human error rather than technical problems or sabotage.
Experts had earlier suggested that fuel exhaustion was a likely cause of the crash that wiped out all but a few members of the Chapocoense soccer team, as well as team officials and journalists accompanying them to a championship playoff match in Medellin, Colombia.
The plane was in the air for about 4 hours and 20 minutes when air traffic controllers in Medellin put it into a holding pattern because another flight had reported a suspected fuel leak and was given priority.
In a recording of a radio message from the pilot of the LaMia flight, he can be heard repeatedly requesting permission to land due to a lack of fuel and a "total electric failure."