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 646 LANDED 10:16 AM MT, ~18 MIN LATE · SCHEDULED TIME UNKNOWN
Today

UA 646 · EWR → SLC

took off 7:43 AM ET · landed 10:16 AM MT (scheduled time unknown)
Forecast issued Sun 11:00 AM ET · 3h after departure

Odds over time

Arrive at SLC more than 15 minutes late?
15% chance · ±0 pts +4 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 5% 10% 15% 20% 1.0d 12h 6h Departs Lands