His plane then passed above an American Airlines 737 loaded with 110 passengers and a six-person crew.
In 2015, Ford told investigators he did not recall the moments before he crashed his vintage plane onto a Los Angeles-area golf course, suffering serious injuries and badly damaging the aircraft.
FAA spokesman Ian Gregor said the plane was cleared to land at runway 20L and the pilot correctly read back the clearance.
Harrison Ford is under federal investigation for landing his private plane on a taxiway and coming too close to a passenger jet. According to NBC anchor Tom Costello, the FAA is opening an investigation into the incident.
The actor was reportedly captured on air traffic control recordings asking, "Was that airliner meant to be underneath me?"
The passenger plane reportedly departed safely minutes later. News learned air traffic controllers informed the actor that he had landed on a taxiway instead of the runway. The mishap could result in anything from a simple warning to suspension of Ford's pilot license, the news agency reported.
The FAA is investigating the incident.
He was piloting a small World War II era-plane when he crashed at a city golf course in Venice.
He also crash-landed a helicopter in 1999 and his Beechcraft Bonanza scraped the runway during an emergency landing at Nebraska's Lincoln Municipal Airport in 2000. However, since today's incident involved over 100 civilians, Ford's actions are required to be closely inspected by officials to make certain nothing out of the ordinary took place.