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.

UNITED · FLIGHT UA 1851 LANDED 10:57 PM CT, ~28 MIN LATE · SCHEDULED TIME UNKNOWN

UA 1851 · MSN → ORD

took off 10:30 PM CT · landed 10:57 PM CT (scheduled time unknown)
Forecast issued Fri 10:00 PM ET · 1h before departure

Odds over time

Arrive at ORD more than 15 minutes late?
27% 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% 10% 20% 30% 40% 2h Now Departs