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.

SOUTHWEST · FLIGHT WN 1439 LANDED 9:50 PM MT, ~10 MIN LATE · SCHEDULED TIME UNKNOWN

WN 1439 · DAL → PHX

took off 9:46 PM CT · landed 9:50 PM MT (scheduled time unknown)
Forecast issued Fri 10:00 PM ET · 1h before departure

Odds over time

Arrive at PHX more than 15 minutes late?
64% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 20% 40% 60% 80% 2h Now Departs Lands