See your big flaw here is that you are saying Leo = Every pedestrian on a commercial flight. You are wanting me to calculate it by airline when the point I am making is that Leo would save emissions by flying with the general public, but he's too good for that so he's willing to sacrifice our environment for his comfort. Yet he will speak out about how we need to all come together and better the environment.
With all of that being said, I would do exactly the same as he does and fly private if I had the means. What I wouldn't do is speak out about an issue that I don't in fact practice myself. It's the whole Hollywood not practicing what they preach. Similar situation is Cunty Perry, I mean Katy* telling everyone in society that we all need to learn how to live together and co-exist with love and peace while she tweets behind her gated compound with armed security.