The inquest jury concluded that the plane in which footballer Emiliano Sala died was operating without the correct licence and was flown by a pilot who did not have the necessary skills.
The UK transport secretary should consider giving the Civil Aviation Authority more power to prevent such flights, as recommended by the coroner of Dorset.
The jury concluded that the Argentine player died from head and chest injuries, but would have been unconscious at the time of the crash due to fumes from the faulty exhaust system. The panel said it was likely that the pilot, David Ibbotson, was also affected by carbon monoxide.
The trip was described by jurors as an unlicensed night flight undertaken in poor weather conditions, and that Ibbotson felt under pressure to fly because it had been arranged by a valued customer.
The jury's conclusion was welcomed by Sala's family, who were pleased that she would raise her concerns about the flights.
Daniel Machover, a lawyer for Sala's mother and two siblings, said: "This inquest has exposed the complex facts leading to the death of Sala." His tragic death has shone a light on many missed opportunities in the worlds of football and aviation.
The jury found that carbon monoxide poisoning is likely to have been caused by a failure in the plane's engine, and that the pilot was unconscious when the accident happened.
The family is happy that the coroner communicated with the authorities about her safety concerns in order to prevent future deaths. No family should have to grieve from a similar accident.
The jury was told that the flight was arranged as part of the player's transfer from the French side to the English side.
He was going to be flown to Wales in a plane by Ibbotson on the night of 21 January, but it crashed into the sea close to Guernsey. The footballer's body was recovered from the depths. Ibbotson's body was not found.
Sala's mother told the inquest that he felt in the middle of a dispute over money between the Welsh and French clubs when he decided to move.
The jury was told that Ibbotson did not have a licence to fly at night. Ibbotson did not tell the authorities about the loud bang on the plane.
David Henderson, the businessman who arranged the flight, has been jailed for his part but, giving evidence via video link, he said it would have been up to Ibbotson to ground the plane if he thought it was not safe.
The flight was arranged by Willie McKay, a long time client of Henderson.
McKay said he organised the flight because he knew the city wouldn't pay for it. McKay spoke of his sadness at the player's death but said he felt he had been used as a scapegoat. All sorts of allegations were made. I have been vilified. My family has been criticized. And why? For helping a young boy.
The report on the tragedy will be sent to the Jockey Club and the Rugby Football Union. She wants the government to review the guidance it gives about flights to the music world.
The jury concluded that Eduardo Sala died as a result of injuries sustained in an aircraft crash where the flight was operated as a commercial flight without the required certifications or permission being in place.
The pilot who was hired by the operator did not have a commercial pilot's licence, a night rating or a single-engine plane rating. He had no experience flying in poor weather.
The truth about the illegal flight has been established in a court of law, according to a spokesman for the city. There should be no doubts about the involvement of Cardiff City in its organisation.