(CNN) — So far this week, more than 6,000 flights inside and outside the United States have been canceled as icy weather hit large swaths of the country.
By Thursday afternoon, flight-tracking site FlightAware had nearly 6,300 flight cancellations recorded from Monday, including more than 750 Thursday cancellations.
Operations at three Texas airports were hit hardest: Dallas-Fort Worth International Airport (DFW), Dallas Love Field (DAL), and Austin-Bergstrom International Airport (AUS).
So far, more than half of the week’s flight cancellations (more than 3,200) have been to or from DFW, including more than 500 on Thursday.
The hardest-hit airlines are also based in Texas. Namely, American Airlines (headquartered near his DFW) and Southwest Airlines (headquartered in Dallas).
American Airlines operations suffered their biggest disruption on Thursday, with more than 400 flights canceled, about 13% of the schedule. Southwest Airlines had far fewer cancellations on Thursday, about 70 flights, or his 1% of the schedule.
DFW Airport said on Twitter Wednesday that it was “continuing to mitigate the effects of the region’s current winter weather.”
Travelers are advised to check with the airline for flight status before going to the airport.