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 1276 LANDED 6:10 PM PT, ~12 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 1276 · PDX → LAS

took off 4:30 PM PT · landed 6:10 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 2h after departure

Odds over time

Arrive at LAS more than 15 minutes late?
51% chance · ±0 pts +22 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 20% 40% 60% 80% 1.1d 12h 6h Departs Lands Now