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.

PSA · FLIGHT OH 5129 LANDED 3:53 PM ET, ~5 MIN LATE · SCHEDULED TIME UNKNOWN

OH 5129 · PVD → PHL

took off 3:03 PM ET · landed 3:53 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 7h after departure

Odds over time

Arrive at PHL more than 15 minutes late?
30% chance · ±0 pts +2 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% 19h 12h 6h Departs Lands