The passenger dragged by force off an overbooked United Airlines US domestic flight has reportedly received a financial settlement from the carrier.

Lawyers for Dr David Dao, 69, say a condition of the payout is that the “amount remain confidential”.

United chief executive Oscar Munoz “said he was going to do the right thing and he has”, Dr Dao’s lawyers said.

The disclosure came the day after United changed its policies so passengers will be offered up to $10,000 for giving up their seats. These and other changes should be “applauded”, according to Dr Dao’s lawyers.

Delta Air Lines also increased its maximum payout to $9,950 and Southwest Airlines said it will no longer overbook flights “as part of our selling process”.

Dr Dao was violently removed by airline law enforcement officers after refusing to give up his seat to United staff in Chicago earlier this month.

Video of the bleeding Vietnamese-American doctor went viral online and sparked international outrage.

The airline had asked Dr Dao to leave his seat in order to allow four United staff members to get from Chicago to Louisville, Kentucky.

Dr Dao’s lawyer, Thomas Demetrio, said his client “has become the unintended champion for the adoption of changes which will certainly help improve the lives of literally millions of travellers”.

Dr Dao suffered concussion, a broken nose, and lost his two front teeth in an experience that his lawyer said was “more horrifying and harrowing” than his experiences during the Vietnam War.