In a fitting end to a miserable week for travelers, U.S. airlines have canceled more than 1,200 flights and another 6,000 are running late.The airlines blamed storms along the East Coast and high winds in the country’s interior on Friday.At New York’s LaGuardia Airport and in Philadelphia, about one-fourth of flights were scrubbed and many more delayed. At O’Hare Airport in Chicago, where there was a high-wind advisory, nearly one-third of takeoffs were late.Tracking service FlightAware.com says 6,000 flights have been canceled and 35,000 delayed this week. Total cancelations since Dec. 1 have passed 81,000. That’s the most in for the winter season since the government started keeping track in 1987-1988. And there’s still a month of winter left.