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 2817 LANDED 9:06 PM ET, ~13 MIN EARLY · SCHEDULED TIME UNKNOWN
Today

WN 2817 · DEN → JAX

took off 4:23 PM MT · landed 9:06 PM ET (scheduled time unknown)
Forecast issued Tue 9:00 PM ET · 2h after departure

Odds over time

Arrive at JAX more than 15 minutes late?
24% chance · ±1 pts −9 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 1d 12h 6h Departs Lands