Hundreds of flights were canceled or delayed Sunday at Denver International Airport as the airport dealt with an issue with its baggage system and airlines grounded Boeing 737 Max 9 planes after an inflight blowout. As of 8:30 p.m. Sunday, there were 549 delayed flights and 63 canceled flights at DIA, according to FlightAware. United Airlines and Southwest Airlines had the most cancellations and delays. There were 56 United flights canceled and another 126 delayed. Southwest had 269 flights delayed and another flight canceled. DIA confirmed a mechanical issue took place Sunday morning with its baggage system. They said that issue was resolved and employees were working to get backlogged bags through the system and onto appropriate planes. Read more: https://www.9news.com/article/travel/united-flights-canceled-dia/73-29a0d9dc-f866-47b6-9d15-6dee45bd8789 ----- More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.