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.

JETBLUE · FLIGHT B6 8366 LANDED 2:23 AM ET, ~38 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

B6 8366 · BOS → JFK

took off 1:44 AM ET · landed 2:23 AM ET (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 21h after departure

Odds over time

Arrive at JFK more than 15 minutes late?
20% chance · ±0 pts −22 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 15% 30% 45% 60% 3h Departs Lands