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 2549 IN THE AIR (OFF 9:24 AM ET, ETA 10:28 AM CT) · SCHEDULED TIME UNKNOWN
Today

WN 2549 · LGA → STL

took off 9:24 AM ET · expected to land 10:28 AM CT (scheduled time unknown)
Forecast issued Tue 7:00 AM ET · 2h before departure

Odds over time

Arrive at STL more than 15 minutes late?
9% chance · ±0 pts +3 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% 5% 10% 15% 20% 1.0d 12h 6h Now Departs Lands