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.

UNITED · FLIGHT UA 1478 LANDED 6:06 PM MT, ~6 MIN LATE · SCHEDULED TIME UNKNOWN

UA 1478 · IAH → PHX

took off 5:34 PM CT · landed 6:06 PM MT (scheduled time unknown)
Forecast issued Fri 10:00 PM ET · 3h after departure

Odds over time

Arrive at PHX more than 15 minutes late?
46% 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% 1h Departs Lands Now