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 3073 LANDED 5:26 PM ET, ~11 MIN LATE · SCHEDULED TIME UNKNOWN

AA 3073 · PHL → BOS

took off 4:37 PM ET · landed 5:26 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 5h after departure

Odds over time

Arrive at BOS more than 15 minutes late?
58% chance · ±0 pts +0 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% 21h 12h 6h Departs Lands