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.

PSA · FLIGHT OH 5237 LANDED 6:54 PM ET, ~2 MIN LATE · SCHEDULED TIME UNKNOWN

OH 5237 · BUF → DCA

took off 5:59 PM ET · landed 6:54 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 4h after departure

Odds over time

Arrive at DCA more than 15 minutes late?
33% 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% 10% 20% 30% 40% 1.1d 12h 6h Departs Lands