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 3398 IN THE AIR (OFF 10:58 PM ET, ETA 12:00 AM CT) · SCHEDULED TIME UNKNOWN
Today

WN 3398 · MCO → STL

took off 10:58 PM ET · expected to land 12:00 AM CT (scheduled time unknown)
Forecast issued Mon 9:00 PM ET · 2h before departure

Odds over time

Arrive at STL more than 15 minutes late?
45% chance · ±0 pts +4 pts · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
WEATHER FORECASTS LIVE IN THE AIR 0% 20% 40% 60% 80% 1.1d 12h 6h Now Departs Lands