I'll get this, being one of the resident DL folks and also since I used to fly in and out of LAX weekly.
In all honesty - you will have to leave security and re-enter. Let me explain why, because depends on the airlines you are flying and what terminal Air France is flying out of.
Most airlines have specific assigned terminals and the terminal buildings make up a U shape. United has 6-8, Delta (and it's related) use 5, American has 4, Southwest and America West/US Air share 1, etc. There are 1 or 3 international carriers that go out of Terminals 2 and 3, but I'm not sure Air France is one of them. Most go out of the International Terminal and that is a separate building at the base of the U. You can easily walk from one terminal to the next via outside sidewalk, but they are not security connected like Chicago, Dulles, DFW, etc. There is no train, either.
Worst case scenario, it might take you about 8 minutes to walk from Terminals 8 and 1 to the International Terminal.