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 1226 LANDED 6:54 PM MT, ~12 MIN LATE · SCHEDULED TIME UNKNOWN

WN 1226 · TUL → DEN

took off 6:34 PM CT · landed 6:54 PM MT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 2h after departure

Odds over time

Arrive at DEN more than 15 minutes late?
23% chance · ±0 pts −3 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% 1.1d 12h 6h Departs Lands Now