Nearly 300 flights were canceled Sunday at Denver International Airport as a massive winter storm continued across the United States. As of 10:45 a.m. Sunday, 270 flights headed in and out of DIA had been canceled and 111 had been delayed, according to flight tracking software FlightAware. Another 1 70 flights were canceled at the airport the day before. United canceled 100 flights at DIA on Sunday, followed by 90 from Southwest, 26 from SkyWest, 17 from Delta, 17 from Frontier, 15 from American Airlines, 3 from Air Canada and 2 from JetBlue. Colorado weather: Snow ‘likely’ during kickoff at Denver Broncos playoff game Related Articles Colorado weather: Snow ‘likely’ during kickoff at Denver Broncos playoff game In Colorado’s devastatingly dry winter, hope abounds for big snows to round out the season: ‘It’s not time for panic’ Hundreds of DIA flights delayed, canceled as cold snap hits metro Denver Denver extends severe weather shelter activation — and adds space — as cold grips city Colorado weather: Denver, Eastern Plains brace for frigid cold as snow is headed to mountains Delays included 33 Southwest flights, 21 United flights and 22 SkyWest flights. Another six airlines delayed between one and five flights. The ongoing winter storm canceled more than 11,300 flights at airports across the country on Sunday, with another 13,700 failing to leave the gate on time, according to FlightAware. The biggest hubs hit were in Philadelphia, Washington, North Carolina, New York and New Jersey. This is a developing story and may be updated. Get more Colorado news by signing up for our daily Your Morning Dozen email newsletter. ...read more read less