A billionaire Saudi royal has lost a High Court fight with a Jordanian businesswoman.
Consultant Daad Sharab sued, claiming that the prince owed her about £6.5 million commission for the part she played in the airliner deal.
The prince disagreed.
Judge Mr Justice Peter Smith ruled against the prince after a hearing in London.
Prince Al-Waleed disputed her claim, at a trial in London earlier this summer, and denied any agreement was made for a ''specific commission''.
The judge said the dispute turned on whose evidence he accepted.
He said both the prince and Mrs Sharab had given evidence, and he said he had "overwhelmingly concluded" that he preferred Mrs Sharab's case.
Mrs Sharab said after the ruling that she was relieved, and added: "Today's decision has reinforced by belief in the fairness and impartiality of the English courts."