Updated:Another round of winter weather left hundreds of travelers stranded at area airports. With all nearby hotels booked, many restored to sleeping in gate waiting rooms at La Guardia Airport. As of Wednesday morning, LGA is reporting about 300 cancelled flights, 200 at Newark and about 100 at JFK. At the American Airlines terminal at LGA, the earliest departing flight is after 12 p.m. Snow plows are working to clear runways.