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 5573 IN THE AIR (OFF 6:06 AM CT, ETA 7:15 AM CT) · SCHEDULED TIME UNKNOWN
Today

OO 5573 · SGF → ORD

took off 6:06 AM CT · expected to land 7:15 AM CT (scheduled time unknown)
Forecast issued Wed 6:00 AM ET · 1h before departure

Odds over time

Arrive at ORD more than 15 minutes late?
41% chance · ±0 pts +19 pts · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 1.0d 12h 6h Now Departs Lands