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 1260 LANDED 8:30 PM ET, ~4 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 1260 · DAL → BWI

took off 4:57 PM CT · landed 8:30 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 4h after departure

Odds over time

Arrive at BWI more than 15 minutes late?
35% chance · ±1 pts +2 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 Now