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 1715 LANDED 1:01 AM PT, ~1 MIN EARLY · SCHEDULED TIME UNKNOWN
Today

G4 1715 · FAT → LAS

took off 12:17 AM PT · landed 1:01 AM PT (scheduled time unknown)
Forecast issued Mon 11:00 AM ET · 8h after departure

Odds over time

Arrive at LAS more than 15 minutes late?
23% chance · ±1 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 10% 20% 30% 40% 1h Departs Lands