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.

FRONTIER · FLIGHT F9 4712 LANDED 2:28 AM ET, ~2 MIN LATE · SCHEDULED TIME UNKNOWN
Today

F9 4712 · ATL → BWI

took off 1:09 AM ET · landed 2:28 AM ET (scheduled time unknown)
Forecast issued Tue 4:00 AM ET · 3h after departure

Odds over time

Arrive at BWI more than 15 minutes late?
19% chance · ±0 pts −4 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
MOSTLY HISTORY WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 6.1d 2d 1d 12h 6h Departs Lands