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 709 LANDED 10:18 AM MT, ~21 MIN LATE · SCHEDULED TIME UNKNOWN

UA 709 · IAD → PHX

took off 9:05 AM ET · landed 10:18 AM MT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 13h after departure

Odds over time

Arrive at PHX more than 15 minutes late?
19% chance · ±0 pts +2 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 18h 12h 6h Departs Lands