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 279 LANDED 1:01 PM ET, ~7 MIN LATE · SCHEDULED TIME UNKNOWN

AA 279 · EDI → PHL

took off 11:23 AM BST · landed 1:01 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?
11% chance · ±0 pts +4 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