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 5301 SCHEDULED · SCHEDULED TIME UNKNOWN
Today

9K 5301 · ACK → BOS

departs 11:39 AM ET · arrives 12:18 PM ET
Your aircraft is KAP811 (C402), coming in as 9K 5301 from BOS: still at BOS, due off about 8:46 AM ET, 126 min before departure.
Forecast issued Tue 6:00 AM ET · 6h before departure

Odds over time

Arrive at BOS more than 15 minutes late?
9% chance · ±0 pts – · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
WEATHER FORECASTS LIVE IN THE AIR 0% 5% 10% 15% 20% 2.4d 2d 1d 12h Now Departs Lands