I was talking to someone from one of these lucky airports recently and he told me that there are 10 cities in the United Airlines system that have nonstop service to each of United’s 8 hubs. As a reminder, those hubs are San Francisco, Los Angeles, Denver, Houston/Intercontinental, Chicago, Cleveland, Washington/Dulles, and Newark. Can you name them all? These don’t have to have year-round nonstops to all hubs – seasonal service counts. For comparison, I missed three.