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 4668 LANDED 1:39 PM PT, ~7 MIN LATE · SCHEDULED TIME UNKNOWN
Today

F9 4668 · SEA → LAS

took off 11:46 AM PT · landed 1:39 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 7h after departure

Odds over time

Arrive at LAS more than 15 minutes late?
68% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 25% 50% 75% 100% 3h Departs Lands