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.

SKYWEST · FLIGHT OO 5696 LANDED 1:47 PM CT, ~4 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

OO 5696 · ORD → STL

took off 1:01 PM CT · landed 1:47 PM CT (scheduled time unknown)
Forecast issued Wed 10:00 PM ET · 8h after departure

Odds over time

Arrive at STL more than 15 minutes late?
68% chance · ±0 pts +12 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 25% 50% 75% 100% 1.0d 12h 6h Departs Lands