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 3768 IN THE AIR (OFF 5:10 PM ET, ETA 6:55 PM CT) · SCHEDULED TIME UNKNOWN
Today

WN 3768 · FLL → MDW

took off 5:10 PM ET · expected to land 6:55 PM CT (scheduled time unknown)
Forecast issued Tue 3:00 PM ET · 2h before departure

Odds over time

Arrive at MDW more than 15 minutes late?
28% chance · ±2 pts −13 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