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 4691 LANDED 4:38 PM ET, ~6 MIN LATE · SCHEDULED TIME UNKNOWN

YX 4691 · LGA → DCA

took off 3:54 PM ET · landed 4:38 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 6h after departure

Odds over time

Arrive at DCA more than 15 minutes late?
38% chance · ±0 pts +11 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% 20h 12h 6h Departs Lands