At least 599 flights were canceled or delayed Thursday at Denver International Airport as blowing snow buffeted Colorado. As of 3:45 p.m., 536 flights at DIA had been delayed and 63 were canceled, according to data from the flight tracking company FlightAware.

DENVER — More than 400 flights were delayed at the Denver International Airport on Saturday as the city experiences foggy conditions ahead of a winter storm. As of 1 p.m., a total of 431 flights have been delayed and 20 have been canceled, according to FlightAware.

A ground delay went into effect at Denver International Airport due to foggy conditions. The FAA said just before 9 a.m. that the delay would last for more than an hour.

While dense fog and snow flurries were seen at the Denver International Airport on Saturday morning, hundreds of flights have been delayed and more than a dozen have been canceled.

DIA is on track to serve 100 million passengers annually by 2027, but it has some work to do before then.

Snow in Denver and across the country have caused increasing problems at Denver International Airport, with more than 400 flights delays and 50 canceled flights reported.