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 4074 LANDED 9:57 PM ET, ~10 MIN LATE · SCHEDULED TIME UNKNOWN

WN 4074 · STL → RSW

took off 6:54 PM CT · landed 9:57 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 2h after departure

Odds over time

Arrive at RSW more than 15 minutes late?
23% chance · ±1 pts −5 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 10% 20% 30% 40% 24h 12h 6h Departs Lands