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 3271 SCHEDULED · SCHEDULED TIME UNKNOWN
Today

WN 3271 · SAN → MKE

departs 1:53 PM PT · arrives 7:12 PM CT
Forecast issued Mon 2:00 PM ET · 3h before departure

Odds over time

Arrive at MKE more than 15 minutes late?
58% chance · ±0 pts +26 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% 1.0d 12h 6h Now Departs Lands