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.

REPUBLIC · FLIGHT YX 3430 LANDED 7:02 AM ET, ~9 MIN LATE · SCHEDULED TIME UNKNOWN

YX 3430 · CMH → IAD

took off 6:10 AM ET · landed 7:02 AM ET (scheduled time unknown)
Forecast issued Wed 10:00 PM ET · 16h after departure

Odds over time

Arrive at IAD more than 15 minutes late?
5% chance · ±0 pts +2 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 3% 6% 9% 12% 1.0d 12h 6h Departs Lands