As the snow melts away from Thursday’s massive upslope snowstorm, more than 500 flights have been canceled or delayed at Denver International Airport Friday.

As of 8 p.m. Friday, 575 flights had been delayed, and another 29 were canceled for weather-related reasons, according to data from the flight tracking site FlightAware.

Affected airlines included SkyWest, Southwest, United, Frontier, CommuteAir, Air Canada, American Airlines, Mesa, Delta, Lufthansa, JetBlue, Allegiant Air, Alaska Airlines, Sun County Airlines and Key Lime Air.

Southwest and United had the most delays on Friday, with 238 Southwest flights and 173 United flights failing to leave the gate on time. Regional airline SkyWest, the airline that operates United Express, also delayed 47 flights.

Get more Colorado news by signing up for our daily Your Morning Dozen email newsletter.