1 From Louisville to Green Bay, the most frequently used aircraft is an Embraer ERJ 135/ERJ 140/ERJ 145. 2  On average, flights from Louisville to Green Bay are cancelled 0.6% of the time. 3  4.8 percent of flights from Louisville to Green Bay are delayed.
I agree that big cities are pegged at around the 2 million mark. I think of medium cities as being between 500,000 and 1.5 million. Small cities are less than 500,000 but more than 100,000. Anything under 100,000 is a town to me, not a city.
San Francisco is also hub of the San Jose-San Francisco-Oakland metropolitan area, which has a population of 8.7 million. San Francisco is the 13th most populous city in the country with a density of 6,266 people per square mile. It's the second most densely populated city in the country after New York City.