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 5021 LANDED 11:36 AM ET, ~15 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

9K 5021 · ACK → BOS

took off 10:47 AM ET · landed 11:36 AM ET (scheduled time unknown)
Forecast issued Mon 10:00 PM ET · 11h after departure

Odds over time

Arrive at BOS more than 15 minutes late?
20% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 10% 20% 30% 40% 1h Departs Lands