Delta passengers were forced to evacuated via slides at Hartsfield-Jackson Atlanta International Airport after haze or smoke was observed in the plane.

Passengers aboard the Delta Air Lines plane that flipped onto its back after crash-landing in Toronto recalled the frightening incident.

Investigators are looking into how all 76 passengers and four crew members aboard Delta Air Lines Flight 4819 survived after the plane crash-landed in Toronto on Monday.

All 21 passengers who were injured when a Delta jet from Minneapolis crashed in Toronto have been released from the hospital.

One passenger said he was “drenched with jet fuel” as the planed rolled upside down and another claimed the crash occurred due to the flight crew’s "inadequate training," according to the lawsuits.

A Delta flight carrying 94 passengers and five crew members left Atlanta Hartsfield-Jackson Airport headed for Columbia, South Carolina, before it was forced to return to Atlanta due to a “haze” in the passenger cabin.

A Delta Air Lines flight returned to Atlanta shortly after takeoff when the crew reported "possible smoke" in the aircraft, according to the FAA.

Delta Airlines has offered $30,000 to each passenger and crew onboard the flight that flipped upside down on Monday.