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.

SKYWEST · FLIGHT OO 3923 LANDED 1:43 PM ET, ~5 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

OO 3923 · XNA → ATL

took off 11:20 AM CT · landed 1:43 PM ET (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 10h after departure

Odds over time

Arrive at ATL more than 15 minutes late?
33% chance · ±0 pts +1 pt · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 15% 30% 45% 60% 9h 6h Departs Lands