MADISON, Wis. (AP) – Three of four airlines have canceled all flights in and out of Dane County Regional Airport.  The terminal at the Madison airport is eerily quiet Thursday as snow from a major Midwest storm continues to fall in the area.  Airport spokesman Brent McHenry says Delta, American Airlines and Frontier have canceled all flights. McHenry says two United Airlines flights landed and departed Thursday. On a typical day the airport has about 100 departures and arrivals.  The airport serves south central Wisconsin where a blizzard warning was posted.