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 3881 LANDED 12:26 PM ET, ~6 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

MQ 3881 · ATL → DCA

took off 11:10 AM ET · landed 12:26 PM ET (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 11h after departure

Odds over time

Arrive at DCA more than 15 minutes late?
41% 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