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.

ALLEGIANT · FLIGHT G4 1388 LANDED 7:05 PM ET, ~1 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

G4 1388 · SDF → SRQ

took off 5:19 PM ET · landed 7:05 PM ET (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 5h after departure

Odds over time

Arrive at SRQ more than 15 minutes late?
28% 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