(CNN) — Hundreds of flights have been canceled Wednesday at Denver International Airport (DIA) as a winter storm sweeps across the Rocky Mountain region, according to data from FlightAware.

According to the flight tracking site, more than 280 flights bound for or departing from DIA had been canceled as of 3:30 p.m. ET, with almost 340 flights delayed.

Almost 180 of the cancellations were Southwest Airlines flights, FlightAware indicates.

On Tuesday, more than 180 flights to or from the Denver airport were canceled.

In a statement to CNN, a DIA spokesperson said despite the cancellations, airport operations are running smoothly.

“Many airlines decide to preemptively cancel flights within a 24 hour period to maintain regular operations,” the spokesperson said.

Still, the airport advises passengers to check with specific airlines for the most up-to-date information on their flights.

Copious snowfall in Denver

As of 11 a.m. MST, 8.6 inches of snow has been recorded at DIA, according to the National Weather Service office in Boulder. This is the largest January snowfall total for Denver since 1992, when 14.8 inches of snow was recorded.

Denver remains under a winter storm warning until 5 p.m. MST, where snow is forecast to continue to fall through late this afternoon.