More than 800 flights have been canceled as winter approaches

(CNN) – More than 800 flights were canceled across the US on Monday as winter weather swept across much of the country.

As of about 3 p.m. ET, about 880 flights within, into or out of the U.S. had been canceled Monday, according to flight-tracking site FlightAware, with about 3,000 delays.

Cancellations were already piling up for Tuesday, with more than 650 canceled by Monday afternoon.

Most of the canceled flights so far affect Dallas Love Field and Dallas-Fort Worth International Airports in Texas.

On Monday, about 180 flights were also canceled to and from Denver International Airport in Colorado. For Tuesday, about 100 flights to and from Austin, Texas, had already been canceled by Monday afternoon.

Dallas-based Southwest Airlines canceled about 420 flights in the US by 3pm ET on Monday.

Regional carrier SkyWest had canceled about 125 flights by Monday afternoon.

Dallas Love Field tweeted Monday that their team “stands ready to process and clean surfaces to allow for safe operations.” DFW was also bracing for bad weather.

Both airports urged travelers to check with their airlines about flight status before going to the airport.

Top image: Drivers in Dallas face winter conditions. Credit: KTVT