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 3127 LANDED 2:40 PM PT, ~5 MIN LATE · SCHEDULED TIME UNKNOWN
Today

WN 3127 · LAS → LGB

took off 1:58 PM PT · landed 2:40 PM PT (scheduled time unknown)
Forecast issued Mon 8:00 PM ET · 3h after departure

Odds over time

Arrive at LGB more than 15 minutes late?
35% chance · ±0 pts +5 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 1.1d 12h 6h Departs Lands