More than 500 flights are canceled due to the arrival of winter weather in the US.

(CNN) — More than 500 US flights were canceled Monday due to winter weather conditions that plague a wide swath of the United States.

As of 10:30 a.m. ET Monday, some 560 flights into, into or out of the United States had been canceled, according to flight tracking site FlightAware. More than 1,200 flights had been delayed by mid-morning Monday.

Most of the cancellations so far affect Dallas Love Field and Dallas-Fort Worth International Airports in Texas, and there are about 100 cancellations to or from Denver International Airport in Colorado.

There is a winter storm warning in effect for much of Texas, including the Dallas-Fort Worth area, until 6 am CT Wednesday.

Dallas-based Southwest Airlines had canceled some 275 flights within, to or from the US as of 10:30 am ET Monday.

The airline, which suffered an operational collapse during the holidays, issued a weather exemption winter seasons for seven airports in Texas and Oklahoma, including Dallas Love Field.
The exemption applies to trips this Monday and Tuesday.

American Airlines issued a waiver this Sunday for Dallas-Fort Worth International Airport that applies to travel from January 30 to February 2. American had canceled 115 US flights as of 10:30 am ET Monday.

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

Both airports urged travelers to check with their airlines on the status of their flights. DFW advised
travelers to check it before going to the airport.

The weather will also make the conditions on the roads treacherous. 1/2″ of ice or sleet is expected in some parts of Texas, according to the National Weather Service. Ice buildup is expected in at least 15 states, the Meteorological Prediction Center of the National Weather Service.

“If you must travel, slow down and use caution, especially when approaching bridges and overpasses,” says the Texas warning.