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 449 LANDED 7:52 AM PT, ~6 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 449 · OAK → ONT

took off 6:57 AM PT · landed 7:52 AM PT (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 12h after departure

Odds over time

Arrive at ONT more than 15 minutes late?
3% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 3% 6% 9% 12% 6h Departs Lands