Hundreds of flights were delayed at Denver International Airport on Sunday as thunderstorms brought winds up to 50 mph to the Front Range.  Related Articles Colorado News | Short-term parking areas at DIA to shift next week for power cleaning Colorado News | DIA braces for 100 million travelers a year after record-high holiday travel Colorado News | Denver International Airport launches facial scanning for travelers headed abroad Colorado News | DIA train car emitted sparks, arcs of electricity after malfunction Colorado News | Mechanical problem halts DIA concourse trains for nearly two hours There were 449 delayed flights at DIA as of 5:20 p.m., according to the flight tracking website FlightAware. Southwest Airlines reported the most delays at 164, and United Airlines had the second-most delays with 124 Arriving flights were delayed by an average of 45 minutes because of thunderstorms, according to the Federal Aviation Administration. This is a developing story and may be updated.  Get more Colorado news by signing up for our Mile High Roundup email newsletter.