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 5803 IN THE AIR (OFF 2:03 PM ET, ETA 2:04 PM CT) · SCHEDULED TIME UNKNOWN
Today

OO 5803 · LEX → ORD

took off 2:03 PM ET · expected to land 2:04 PM CT (scheduled time unknown)
Forecast issued Sat 1:00 PM ET · 1h before departure

Odds over time

Arrive at ORD more than 15 minutes late?
42% chance · ±0 pts – · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
LIVE IN THE AIR 0% 15% 30% 45% 60% 2h Now Departs Lands