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 188 LANDED 4:28 AM ET, ~6 MIN EARLY · SCHEDULED TIME UNKNOWN

B6 188 · LAX → BOS

took off 8:29 PM PT · landed 4:28 AM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 2h before departure

Odds over time

Arrive at BOS more than 15 minutes late?
33% chance · ±1 pts −2 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% 15% 30% 45% 60% 3.0d 2d 1d 12h 6h Now Departs Lands