This is the terrifying moment a passenger allegedly tried to open the emergency door of a plane mid-flight.

The suspect, not named in reports, was said to have sat in a cabin crew seat without permission while on Korean Air flight KE658 from Bangkok, Thailand, to Incheon, South Korea, on November 7.

When an air hostess ordered him to leave, he reportedly threatened her despite being warned that he may have been violating Korea's Aviation Security Act.

Footage shows flight attendants scrambling to stop the man as he grabbed the door latch and allegedly tried to open it.

The crew were able to restrain him and he was taken to a separate area to calm down.

The Airbus A330-300 with 238 passengers onboard landed without delays at the Incheon International Airport in Seoul at around 4:45 am.

The man was handed over to the Incheon International Airport Police for investigation.

Korean Air said in a statement: 'The incident was managed according to our established security protocols, to prioritise passenger safety and operational integrity. While the situation was successfully contained, we will cooperate with relevant authorities in the investigation of this matter.

'Korean Air maintains a zero-tolerance approach to behaviours that compromise aviation safety and will continue to respond decisively to such incidents.'

In June 2023, a teenage passenger sparked panic on a Jeju Airlines flight from Cebu, the Philippines, to Seoul, South Korea, when he also tried to open the emergency door of the plane.

The South Korean man, 19, reportedly dashed to open the door but was quickly subdued by the crew 'using a lasso'. They allegedly bound him with the rope and tie wraps and moved him to the front of the plane to be observed.

He reportedly tested positive for drugs upon landing. He was handed over to the police at the Incheon International Airport.