Shocking footage was shared and watched by millions of people online.
The latest incident to hit United Airlines's reputation came on Wednesday when it announced an investigation into the death of a giant rabbit which was being transported on one of its planes.
The 90cm-long bunny, called Simon, was found dead in the cargo hold when the flight arrived at Chicago's O'Hare airport from London Heathrow.
Law enforcement officials dragged Dr Dao off the flight forcibly after the 69-year-old Vietnamese-American physician had refused to leave, saying he needed to go home to see his patients.
His lawyer later said that Dr Dao found the experience "more horrifying and harrowing than what he experienced when leaving Vietnam".
The ordeal led to demonstrations at Chicago's O'Hare International Airport and turned into a public relations disaster for United Airlines.
The airline offered compensation to all customers on board the flight.
In addition to the $10,000 compensation offer, the series of actions announced as part of the report into the incident includes:
In late March, United was heavily criticised on social media after two girls were reportedly barred from flying for wearing leggings on a flight from Denver to Minneapolis.
United said the girls were travelling on a special pass, for employees and their guests, which has a dress code.Published: 2017-04-27 14:08:20