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 91 LANDED 4:35 PM CT, ~11 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

AA 91 · LHR → ORD

took off 2:49 PM BST · landed 4:35 PM CT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 12h after departure

Odds over time

Arrive at ORD more than 15 minutes late?
15% chance · ±0 pts +3 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 5% 10% 15% 20% 14h 12h 6h Departs Lands