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 1961 LANDED 12:43 AM PT, ~6 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

F9 1961 · DFW → LAS

took off 12:20 AM CT · landed 12:43 AM PT (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 21h after departure

Odds over time

Arrive at LAS more than 15 minutes late?
38% chance · ±0 pts −3 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