Over 600 flights were canceled or delayed on Monday after icy conditions and poor visibility plagued the runway, according to reports.
There were 650 flights affected, which could not have come at a worse time, according to the Denver Post.
The Denver International Airport was on its way to recovery after a tumultuous week of holiday travel when Southwest Airlines stranded thousands of passengers in airports across the country, including Denver.
SOUTHWEST MELTDOWN: Snow showers were expected to continue through most of the day and into the evening on Monday, according to Fox station KDVR in Denver.
Denver International reported 139 flights were canceled and 418 delayed on Monday at 7: 30 p.m. EST.
There were 7,077 flight delays within, into or out of the U.S. and 710 cancellations, according to Flight Tracker website FlightAware.com.
According to FlightAware s data, Denver's airport also led the nation in cancelations and delays during the day.
Southwest Airline is a major airline that flies in and out of Denver.
Two days before Christmas, a winter storm that swept across the country crippled air travel, leaving many passengers stranded in airports across the country.
Delays continued through the weekend and into the following week.
The US Department of Transportation and the Biden administration both stated on Tuesday that airlines will be held accountable if customer service plans aren't followed during the cancellations and delays.
Southwest accounted for 58 of the cancelled flights in the world with 2,356 cancellations as of Thursday morning.