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 276 LANDED 4:17 PM CT, ~6 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 276 · MSP → MDW

took off 3:14 PM CT · landed 4:17 PM CT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 6h after departure

Odds over time

Arrive at MDW more than 15 minutes late?
53% 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% 20% 40% 60% 80% 1.1d 12h 6h Departs Lands