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 1484 LANDED 6:31 PM ET, ~8 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 1484 · DCA → ATL

took off 5:07 PM ET · landed 6:31 PM ET (scheduled time unknown)
Forecast issued Sun 10:00 PM ET · 5h after departure

Odds over time

Arrive at ATL more than 15 minutes late?
77% chance · ±0 pts +13 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 25% 50% 75% 100% 1.1d 12h 6h Departs Lands