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.

SOUTHWEST · FLIGHT WN 375 IN THE AIR (OFF 2:27 PM PT, ETA 4:18 PM MT) · SCHEDULED TIME UNKNOWN
Today

WN 375 · LAS → SLC

took off 2:27 PM PT · expected to land 4:18 PM MT (scheduled time unknown)
Forecast issued Tue 4:00 PM ET · 2h before departure

Odds over time

Arrive at SLC more than 15 minutes late?
63% chance · ±4 pts +15 pts · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
WEATHER FORECASTS LIVE IN THE AIR 0% 25% 50% 75% 100% 1.1d 12h 6h Now Departs Lands