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.

AMERICAN · FLIGHT AA 899 LANDED 6:41 AM CT, ~13 MIN LATE · SCHEDULED TIME UNKNOWN
Today

AA 899 · LAX → ORD

took off 1:11 AM PT · landed 6:41 AM CT (scheduled time unknown)
Forecast issued Sat 10:00 AM ET · 6h after departure

Odds over time

Arrive at ORD more than 15 minutes late?
33% chance · ±0 pts +0 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
MOSTLY HISTORY WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 6.2d 2d 1d 12h 6h Departs Lands