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 1051 LANDED 9:29 PM ET, ~6 MIN LATE · SCHEDULED TIME UNKNOWN

AA 1051 · ORD → PIT

took off 7:29 PM CT · landed 9:29 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 2h after departure

Odds over time

Arrive at PIT more than 15 minutes late?
41% chance · ±2 pts +5 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% 1.0d 12h 6h Departs Lands