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 4119 IN THE AIR (OFF 1:52 PM PT, ETA 6:09 PM CT) · SCHEDULED TIME UNKNOWN
Today

WN 4119 · LAS → DSM

took off 1:52 PM PT · expected to land 6:09 PM CT (scheduled time unknown)
Forecast issued Tue 4:00 PM ET · 1h before departure

Odds over time

Arrive at DSM more than 15 minutes late?
51% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 25% 50% 75% 100% 13h 6h Now Departs Lands