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 677 LANDED 12:37 PM CT, ~17 MIN LATE · SCHEDULED TIME UNKNOWN

AA 677 · GEG → ORD

took off 7:40 AM PT · landed 12:37 PM CT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 11h after departure

Odds over time

Arrive at ORD more than 15 minutes late?
30% chance · ±0 pts +9 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