Hundreds of flights at Denver International Airport were delayed on Monday as high winds sweep through the region.

As of 4 p.m. Monday, 285 flights were delayed and nine flights were canceled, according to flight tracker site FlightAware.

The flight tracker shows Southwest Airlines at 104 delays, while United sits at 84 and SkyWest with 47 delays.

Tuesday’s wind gusts may reach as high as 44 mph, while northwest winds could average between 15 to 20 mph throughout the day.

Tuesday night it’ll be mostly clear, with a low around 20. Northwest winds between 5 to 10 mph become light and variable in the evening. Winds could gust as high as 15 mph.

Flight delays come as thousands of travelers are visiting, passing through or leaving from one of the nation’s most busiest airports during the holidays.