The insider told UsWeekly "There had been talk of cancelling [the trip] but Jada insisted."
Following the row, Smith resigned from the Academy of Motion Picture Arts and Sciences and has since apologised to Rock, the academy and his fans.
He said: "My actions at the 94th Academy Awards presentation were shocking, painful, and inexcusable. The list of those I have hurt is long and includes Chris, his family, many of my dear friends and loved ones, all those in attendance, and global audiences at home. I betrayed the trust of the Academy."
The 'Bad Boys' star was later banned from the attending Oscars for the next 10 years as a result of his smack, but said in a statement that he "accepted" and "respected" the decision.