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 1479 LANDED 3:36 PM ET, ~15 MIN LATE · SCHEDULED TIME UNKNOWN

AA 1479 · ORD → BOS

took off 12:34 PM CT · landed 3:36 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 8h after departure

Odds over time

Arrive at BOS more than 15 minutes late?
50% 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% 20% 40% 60% 80% 20h 12h 6h Departs Lands