Hundreds of Korean Air Lines workers protested in the centre of Seoul late on Friday, calling for the airline's chairman Cho Yang-ho to resign because of the bad behavior of his daughters.

The South Korean airline conglomerate has faced mounting public outrage after the chairman's youngest daughter Cho Hyun-min - the younger sister of the notorious "nut rage" heiress of the airline - was accused of throwing a drink at people at a business meeting last month.

In 2014, his other daughter, Heather Cho, made headlines around the world when she lost her temper over the way she was served nuts in first class on a Korean Air plane and demanded that it return to its gate at a New York airport. She was jailed and returned to work as an executive of Korean Air's hotel affiliate in March.

The latest tantrum by the heiresses reignited public impatience with family-run conglomerates that dominate South Korea's economy, over what some people see as unchecked bad behavior by the rich and powerful.

In response to growing public backlash, Cho Yang-ho, the company chairman, made his daughters step down from their positions at the airline and made a public apology for their behavior. Workers said they would continue to go out to protest until the chairman also steps down.