Your screenshots just confirms what I've suspected: you still are having video memory corruption, due to the long flight. I'm sorry, but I don't see any other option than trying to lower your graphic settings, hoping it the issue will be fixed.
Just to be more clear about it: until you are about 10NM out from KLAX, NOTHING of the scenery is loaded. Which means, by the time you go there and the scenery is finally loaded, the eventual memory leakage/corruption due to the long flight has already happened, and KLAX is just a victim of a problem that has already happened, but you wouldn't see it, because it needed to load a fairly large airport with lots of textures like KLAX, to become apparent.