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.

UNITED · FLIGHT UA 53 LANDED 2:43 PM ET, ~8 MIN LATE · SCHEDULED TIME UNKNOWN

UA 53 · ZRH → IAD

took off 12:05 PM CEST · landed 2:43 PM ET (scheduled time unknown)
Forecast issued Tue 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% 10h 6h Departs Lands