I think most people would say that the "very small" is appropriate language for O&D at Amarillo or Burlington, Vt. Charlotte O&D is somewhere around #20-25 nationwide, depending on how you slice and dice markets and how you aggregate airports in metro areas that have more than one. That's low-end for a sustainable hub, although the O&D figure for CLT has not enjoyed the boost from WN that some other markets have.

But the flip side is that if AA+US walks away from CLT, the biggest winner will be DL -- and it's all about connecting traffic in the southeast, not O&D at CLT. I don't think Doug Parker wants to give that kind of birthday present to Richard Anderson.