As language mavens know, discerning speakers say "whence" rather than "from whence" since "whence" means "from where". This pattern is seen in similar words: "thence" means "from there" and "hence" means "from here" (such as in "henceforth").
While an oversimplification, "from x-re" perhaps then can be replaced with "x-nce" in a sort of locative reversed contraction. This doesn't work all the time ("once" does not mean "from ore" and "wince" does not mean "from wire") but it's a fun post hoc rule.
And thus is born my innovation: if you flew from Chicago's major airport, you will have flown O'Hance.
Top image:Nick Harris/Flickr/CC