Actually, I think I wrote that Limbaugh is the only one I’ve heard it from.
However, it is such a curious detail to be WRONG on. One would naturally assume either his plane or her plane.
According to other reports, it was hers. And, Clinton "surprised" her, by delaying his departure until she arrived, and then just walking over to her plane.
It would be a useful detail to nail down, because it would determine how much of the "narrative" is true, and how much is CYA.