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.

UNITED · FLIGHT UA 15 LANDED 6:03 PM ET, ~2 MIN LATE · SCHEDULED TIME UNKNOWN

UA 15 · LHR → EWR

took off 3:44 PM BST · landed 6:03 PM ET (scheduled time unknown)
Forecast issued Wed 10:00 PM ET · 11h after departure

Odds over time

Arrive at EWR more than 15 minutes late?
30% chance · ±0 pts +5 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% 1.1d 12h 6h Departs Lands