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 2272 IN THE AIR (OFF 1:27 AM ET, ETA 2:47 AM ET) · SCHEDULED TIME UNKNOWN
Today

F9 2272 · ATL → MIA

took off 1:27 AM ET · expected to land 2:47 AM ET (scheduled time unknown)
Forecast issued Tue 1:00 AM ET · 0h before departure

Odds over time

Arrive at MIA more than 15 minutes late?
17% chance · ±2 pts −24 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