Overnight TSA security checkpoint times change at Denver International Airport
TSA will no longer operate checkpoints and bag scans from 1 a.m. to 3 a.m.
Over 800 flights at DIA were canceled on Thursday due to a winter storm hitting Colorado
Almost half of the canceled flights, 316, are through Southwest Airlines. That accounts for 51% of their Denver traffic. Frontier Airlines has canceled 91% of their Denver flights.