At least 204 flights were delayed Saturday morning at Denver International Airport, as snow and bitter cold brought by a polar vortex gripped the metro area. Nearly half of the flights — 101, as of 11:45 a.m. — belonged to United, according to flight tracking service FlightAware. An additional 54 belonged to SkyWest and 33 to Southwest, while AeroMéxico, Air Canada, Alaska Airlines, American Airlines, Delta, Frontier, Jazz and Key Lime Air experienced a smaller number of delays. No cancellations have been reported so far. Snow and ice began impacting ground transportation across Colorado late Friday, and the National Weather Service warns snow and ice will continue to make roadways slippery through Saturday afternoon. Related Articles Transportation | Denver International Airport ranks sixth in U.S. for guns found in carry-on luggage Transportation | DIA’s iconic art collection lands a new star even as the airport struggles to bring back pieces that have been in storage for years Transportation | 599 flights canceled, delayed at DIA Thursday as more snow hits Denver Transportation | Denver auditor plans new DIA probe after finding risk of overpayment Transportation | 718 flights canceled, delayed at DIA Tuesday as snow hits Denver Get more Colorado news by signing up for our Mile High Roundup email newsletter.