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 3945 LANDED 1:11 PM CT, ~5 MIN LATE · SCHEDULED TIME UNKNOWN

WN 3945 · TPA → MKE

took off 11:48 AM ET · landed 1:11 PM CT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 10h after departure

Odds over time

Arrive at MKE more than 15 minutes late?
14% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 10% 20% 30% 40% 8h 6h Departs Lands