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 4439 LANDED 8:44 AM CT, ~6 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 4439 · RDU → AUS

took off 7:06 AM ET · landed 8:44 AM CT (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 15h after departure

Odds over time

Arrive at AUS more than 15 minutes late?
12% 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% 3h Departs Lands