More than 600 flights canceled as winter weather moves in

(CNN) — More than 600 US flights have been canceled on Monday as winter weather bears down on a wide swath of the United States.

As of 11:30 a.m. ET, about 660 flights within, into or out of the US had been canceled Monday, according to flight tracking site FlightAware. About 1,500 flights were delayed.

The bulk of the cancellations so far are affecting Dallas Love Field and Dallas-Fort Worth International airports in Texas, with about 100 cancellations to or from Denver International Airport in Colorado.

Dallas-based Southwest Airlines had canceled about 330 flights within, into or out of the US by 11:30 a.m. ET on Monday.

Regional carrier SkyWest had canceled about 100 flights by midday Monday.

Dallas Love Field tweeted on Monday that its team “stands ready to treat and clear surfaces to allow for safe operations.” DFW is also preparing for bad weather.

Both airports urged travelers to check with their airlines for flight status. DFW advised travelers to check before coming to the airport.