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 3359 LANDED 5:39 PM ET, ~5 MIN EARLY · SCHEDULED TIME UNKNOWN
Yesterday

WN 3359 · PHX → ATL

took off 11:39 AM MT · landed 5:39 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 7h after departure

Odds over time

Arrive at ATL more than 15 minutes late?
38% chance · ±0 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% 11h 6h Departs Lands