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 2345 LANDED 4:47 PM MT, ~9 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

F9 2345 · IND → DEN

took off 4:18 PM ET · landed 4:47 PM MT (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 6h after departure

Odds over time

Arrive at DEN more than 15 minutes late?
27% chance · ±0 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