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 3678 LANDED 1:19 PM CT, ~12 MIN LATE · SCHEDULED TIME UNKNOWN

WN 3678 · SMF → BNA

took off 7:31 AM PT · landed 1:19 PM CT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 12h after departure

Odds over time

Arrive at BNA more than 15 minutes late?
9% 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 Departs Lands