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 4355 LANDED 1:39 AM PT, ~7 MIN LATE · SCHEDULED TIME UNKNOWN
Today

WN 4355 · AUS → OAK

took off 12:06 AM CT · landed 1:39 AM PT (scheduled time unknown)
Forecast issued Sat 1:00 PM ET · 12h after departure

Odds over time

Arrive at OAK more than 15 minutes late?
17% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 10% 20% 30% 40% 1h Departs Lands