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.

REPUBLIC · FLIGHT YX 4578 LANDED 7:52 AM ET, ~9 MIN LATE · SCHEDULED TIME UNKNOWN

YX 4578 · GSP → LGA

took off 6:20 AM ET · landed 7:52 AM ET (scheduled time unknown)
Forecast issued Wed 10:00 PM ET · 16h after departure

Odds over time

Arrive at LGA more than 15 minutes late?
14% chance · ±0 pts +6 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% 1.0d 12h 6h Departs Lands