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.

DELTA · FLIGHT DL 2196 LANDED 4:51 PM ET, ~10 MIN LATE · SCHEDULED TIME UNKNOWN
Today

DL 2196 · BOS → IAD

took off 3:38 PM ET · landed 4:51 PM ET (scheduled time unknown)
Forecast issued Tue 7:00 PM ET · 3h after departure

Odds over time

Arrive at IAD more than 15 minutes late?
44% chance · ±0 pts +12 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 25% 50% 75% 100% 2.8d 2d 1d 12h 6h Departs Lands