Which is understandable, it's like your younger brother stealing your candy. Maybe a POD during the July Revolution itself?
Which one? I would first thnk that a POD during th July Revolution could have more likely butterflied Louis-Philippe being King of the French in first place but, it's quite vague.
Maybe a better POD would be no Henri, duke of Bordeaux (let's assume his mother is killed with his father). Have then Louis de France getting the hell out of the way (Kill him, make him abdicate, abducted by aliens, whatever) before the July Revolution and Louis-Philippe became the natural sucessor of the throne.
Of course, he wouldn't be as much tolerated than OTL, for being totally associated with Legitimist policy whatever he wants it or not, but if he manages to stand up to 1848 revolutions, he would have lasted longer and maybe, as Emperor Constantine said, it would give more chance to have his son succeeding him. (By exemple, a revolt force the father to abdicate, and put his son on the throne)