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 3240 LANDED 8:34 AM ET, ~8 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

AA 3240 · DCA → BOS

took off 7:36 AM ET · landed 8:34 AM ET (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 14h after departure

Odds over time

Arrive at BOS more than 15 minutes late?
16% chance · ±0 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% 10% 20% 30% 40% 10h 6h Departs Lands