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.

FRONTIER · FLIGHT F9 2538 LANDED 10:32 AM ET, ~14 MIN LATE · SCHEDULED TIME UNKNOWN

F9 2538 · TPA → PHL

took off 8:27 AM ET · landed 10:32 AM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 14h after departure

Odds over time

Arrive at PHL more than 15 minutes late?
15% chance · ±0 pts −10 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% 2.6d 2d 1d 12h 6h Departs Lands