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 4073 LANDED 7:06 AM CT, ~4 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 4073 · STL → HOU

took off 5:30 AM CT · landed 7:06 AM CT (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 16h after departure

Odds over time

Arrive at HOU more than 15 minutes late?
6% chance · ±0 pts +0 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 3% 6% 9% 12% 3h Departs Lands