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 2974 LANDED 9:21 PM ET, ~5 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 2974 · MCI → DCA

took off 6:20 PM CT · landed 9:21 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 3h after departure

Odds over time

Arrive at DCA more than 15 minutes late?
39% chance · ±1 pts +9 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 1.1d 12h 6h Departs Lands