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 1266 LANDED 3:11 PM PT, ~6 MIN LATE · SCHEDULED TIME UNKNOWN

WN 1266 · LGB → LAS

took off 2:27 PM PT · landed 3:11 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 4h after departure

Odds over time

Arrive at LAS more than 15 minutes late?
56% chance · ±0 pts +23 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