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 1448 LANDED 9:59 PM MT, ~20 MIN LATE · SCHEDULED TIME UNKNOWN

DL 1448 · ORD → SLC

took off 7:48 PM CT · landed 9:59 PM MT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 1h after departure

Odds over time

Arrive at SLC more than 15 minutes late?
31% chance · ±3 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% 1.0d 12h 6h Departs Now Lands