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.

REPUBLIC · FLIGHT YX 4736 LANDED 6:15 PM ET, ~1 MIN EARLY · SCHEDULED TIME UNKNOWN
Today

YX 4736 · LGA → DCA

took off 5:33 PM ET · landed 6:15 PM ET (scheduled time unknown)
Forecast issued Tue 5:00 PM ET · 0h before departure

Odds over time

Arrive at DCA more than 15 minutes late?
37% chance · ±0 pts +4 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 1.1d 12h 6h Now Departs Lands