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 1339 LANDED 5:39 PM CT, ~38 MIN LATE · SCHEDULED TIME UNKNOWN
Today

AA 1339 · GPI → ORD

took off 2:46 PM -05 · landed 5:39 PM CT (scheduled time unknown)
Forecast issued Wed 6:00 PM ET · 2h after departure

Odds over time

Arrive at ORD more than 15 minutes late?
50% chance · ±2 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% 20% 40% 60% 80% 1.0d 12h 6h Departs Lands