Nearly 300 flights were canceled or delayed at Denver International Airport on Sunday as a third day of below-freezing weather and snow buffeted the city. As of 3:45 p.m. Sunday, eight flights had been canceled at DIA and another 245 failed to leave the gate on time, according to flight tracking software FlightAware. United and its regional airline, Skywest, delayed the most flights Sunday at 161 combined, according to FlightAware data. Southwest took third with 44 delayed flights. According to flight data, United also canceled the most flights, removing six flights from its Sunday roster. JetBlue took second with two flights canceled. Frontier, Key Lime Air, Delta, American Airlines, Alaska Airlines and Jazz were all affected by weather-fueled flight delays. Winter weather in the northeast was also causing issues for DIA on Sunday, delaying and canceling flights to New Jersey’s Essex County Airport, New York’s John F. Kennedy International Airport and Pennsylvania’s Philadelphia International Airport, according to the Federal Aviation Administration. Related Articles Weather | Colorado weather: Colder temperatures still to come, snow returns Sunday to Denver Weather | Colorado snow totals for Jan. 19, 2025 Weather | Colorado road conditions: Freeways icy but open after overnight snow Weather | Colorado weather: Front Range feels brunt of arctic cold and snow surge Weather | Colorado snow totals for Jan. 18, 2025 New Jersey’s airport closed Sunday for winter weather and was expected to reopen Monday morning, according to FAA officials. Denver passengers headed to New York were experiencing up to 3-hour travel delays at DIA and travelers en route to Philadelphia were seeing average delays of up to 45 minutes, according to FAA officials. This is a developing story and may be updated.  Get more Colorado news by signing up for our daily Your Morning Dozen email newsletter.