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 1639 LANDED 5:07 PM PT, ~7 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 1639 · SNA → LAS

took off 4:24 PM PT · landed 5:07 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 3h after departure

Odds over time

Arrive at LAS more than 15 minutes late?
56% chance · ±0 pts +14 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% 1.2d 1d 12h 6h Departs Lands