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 1347 LANDED 10:44 PM ET, ~7 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 1347 · DAL → DCA

took off 7:26 PM CT · landed 10:44 PM ET (scheduled time unknown)
Forecast issued Fri 10:00 PM ET · 2h after departure

Odds over time

Arrive at DCA more than 15 minutes late?
83% chance · ±0 pts +39 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% 3.9d 2d 1d 12h 6h Departs Lands