Continental US, I suppose? Will look it up.
EDIT: Well, obviously that's the way. Why should they go over china? That makes absolutely no sense on a globe, so on which flat earth model would it?
The point is that it would make no sense for the planes to fly the "long way" around the earth between those two southern points. We only have data for that route.
That sounds awfully close to an admission that the flight data is accurate.