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.

ENVOY · FLIGHT MQ 3939 LANDED 5:10 PM CT, ~20 MIN LATE · SCHEDULED TIME UNKNOWN

MQ 3939 · MCI → ORD

took off 4:06 PM CT · landed 5:10 PM CT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 5h after departure

Odds over time

Arrive at ORD more than 15 minutes late?
35% chance · ±0 pts +11 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% 2.8d 2d 1d 12h 6h Departs Lands