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 1777 IN THE AIR (OFF 6:46 PM ET, ETA 7:36 PM CT) · SCHEDULED TIME UNKNOWN
Today

WN 1777 · FLL → BNA

took off 6:46 PM ET · expected to land 7:36 PM CT (scheduled time unknown)
Forecast issued Tue 6:00 PM ET · 1h before departure

Odds over time

Arrive at BNA more than 15 minutes late?
35% chance · ±1 pts −6 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% 1.2d 1d 12h 6h Now Departs Lands