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 1034 IN THE AIR (OFF 11:44 AM PT, ETA 8:01 PM ET) · SCHEDULED TIME UNKNOWN
Today

B6 1034 · SFO → BOS

took off 11:44 AM PT · expected to land 8:01 PM ET (scheduled time unknown)
Forecast issued Tue 3:00 PM ET · 0h before departure

Odds over time

Arrive at BOS more than 15 minutes late?
51% chance · ±1 pts +24 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 20% 40% 60% 80% 2.2d 1d 12h 6h Departs Lands