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 2300 LANDED 10:34 AM AT, ~8 MIN LATE · SCHEDULED TIME UNKNOWN
Today

F9 2300 · ATL → SJU

took off 7:31 AM ET · landed 10:34 AM AT (scheduled time unknown)
Forecast issued Sat 11:00 AM ET · 4h after departure

Odds over time

Arrive at SJU more than 15 minutes late?
25% chance · ±1 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 15% 30% 45% 60% 2h Departs Lands