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 173 LANDED 4:16 PM MT, ~14 MIN LATE · SCHEDULED TIME UNKNOWN
Today

WN 173 · BOI → DEN

took off 2:45 PM MT · landed 4:16 PM MT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 5h after departure

Odds over time

Arrive at DEN more than 15 minutes late?
28% chance · ±0 pts +5 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 10% 20% 30% 40% 1.1d 12h 6h Departs Lands