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 754 LANDED 1:42 PM ET, ~4 MIN LATE · SCHEDULED TIME UNKNOWN

B6 754 · DCA → BOS

took off 12:44 PM ET · landed 1:42 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 9h after departure

Odds over time

Arrive at BOS more than 15 minutes late?
44% chance · ±0 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% 7h 6h Departs Lands