Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

SKYWEST · FLIGHT OO 5509 LANDED 5:56 PM MT, ~15 MIN LATE · SCHEDULED TIME UNKNOWN

OO 5509 · SHV → DEN

took off 4:56 PM CT · landed 5:56 PM MT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 4h after departure

Odds over time

Arrive at DEN more than 15 minutes late?
25% chance · ±0 pts −1 pt · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 1.1d 12h 6h Departs Lands