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.

DELTA · FLIGHT DL 1791 LANDED 10:16 AM ET, ~8 MIN LATE · SCHEDULED TIME UNKNOWN

DL 1791 · DTW → LGA

took off 9:05 AM ET · landed 10:16 AM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 13h after departure

Odds over time

Arrive at LGA more than 15 minutes late?
25% chance · ±0 pts +0 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 10% 20% 30% 40% 6h Departs Lands