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 384 LANDED 2:26 PM MT, ~21 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 384 · PHL → DEN

took off 12:50 PM ET · landed 2:26 PM MT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 9h after departure

Odds over time

Arrive at DEN more than 15 minutes late?
28% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 10% 20% 30% 40% 9h 6h Departs Lands