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 1501 LANDED 5:33 PM CT, ~11 MIN LATE · SCHEDULED TIME UNKNOWN

AA 1501 · BZN → ORD

took off 2:10 PM MT · landed 5:33 PM CT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 6h after departure

Odds over time

Arrive at ORD more than 15 minutes late?
37% chance · ±1 pts +10 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 20h 12h 6h Departs Lands