That would come as news to Alaska Airlines (Seattle to Portland / Eugene, OR or Boise, ID) or Southwest Airlines (L.A. Basin to Las Vegas), among others.
Yes, Ms. Harris-Perry's ignorance is exceeded only by her arrogance. But let's not get carried away.
Well, certainly here in the Northeast you can’t get on a commercial flight at Newark Liberty and think they’ll take you to JFK or vice versa.