The incident has prompted a U.S. congressman to propose legislation to prohibit airlines from forcibly removing passengers from flights to make room for other customers after they have already boarded the plane.
Law enforcement officials dragged Dr Dao off a flight departing from Chicago for Louisville, Kentucky, because it was fully booked, and the airline wanted four passengers to make way for staff members.
The video of this bloody incident went viral and sparked social media uproar, in which many echoed a call to boycott the airline.
Crew members are now required to make must-ride bookings at least 60 minutes prior to departure.
Crew members will now have to check into flights an hour before take-off to avoid altercations about overbooking with passengers who have paid for their seats.
The policy change came after its violent removal of an Asian-American passenger from a flight on Sunday night evolved into a public relations crisis.
It's no surprise airlines would want to beef up the incentives for customers they need to bump from flights. United Airlines spokesman Charlie Hobart said the airline sought volunteers to exit the flight for compensation, but none stepped forward.
The city and United agreed to preserve the evidence, Dao's attorney, Thomas Demetrio said on Saturday. But the airline later said it needed to make room for its own employees to keep other flights on schedule.
The incident has highlighted the ways airlines handle bumping passengers off flights.
Two United Airlines planes taking off at George Bush Intercontinental Airport in Houston.
Footage revealed him screaming before being knocked out as he was dragged along the aisle while fellow passengers looked on and protested.
The change comes in response to videos showing a man being dragged from his seat after refusing to give it up voluntarily.
"This ensures situations like flight 3411 never happen again".