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.

CAPE AIR · FLIGHT 9K 1838 LANDED 4:31 PM ET, ~5 MIN LATE · SCHEDULED TIME UNKNOWN
Today

9K 1838 · BHB → BOS

took off 3:16 PM ET · landed 4:31 PM ET (scheduled time unknown)
Forecast issued Wed 8:00 PM ET · 5h after departure

Odds over time

Arrive at BOS more than 15 minutes late?
20% chance · ±0 pts +9 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% 17h 12h 6h Departs Lands