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 2403 LANDED 12:57 PM MT, ~10 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 2403 · LGA → DEN

took off 11:19 AM ET · landed 12:57 PM MT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 11h after departure

Odds over time

Arrive at DEN more than 15 minutes late?
41% 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% 7h 6h Departs Lands