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.

MESA · FLIGHT YV 4070 IN THE AIR (OFF 2:53 PM ET, ETA 3:58 PM ET) · SCHEDULED TIME UNKNOWN
Today

YV 4070 · IAD → TYS

took off 2:53 PM ET · expected to land 3:58 PM ET (scheduled time unknown)
Forecast issued Mon 1:00 PM ET · 2h before departure

Odds over time

Arrive at TYS more than 15 minutes late?
17% chance · ±0 pts – · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
LIVE IN THE AIR 0% 10% 20% 30% 40% 4h Now Departs Lands