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 3960 LANDED 11:54 AM ET, ~7 MIN LATE · SCHEDULED TIME UNKNOWN

WN 3960 · BNA → SDF

took off 10:25 AM CT · landed 11:54 AM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 11h after departure

Odds over time

Arrive at SDF more than 15 minutes late?
15% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 5% 10% 15% 20% 7h 6h Departs