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 93 LANDED 1:56 PM ET, ~7 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

AA 93 · ZRH → PHL

took off 11:56 AM CEST · landed 1:56 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 16h after departure

Odds over time

Arrive at PHL more than 15 minutes late?
9% 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% 5% 10% 15% 20% 15h 12h 6h Departs Lands