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 345 IN THE AIR (OFF 8:42 PM ET, ETA 9:05 AM CEST) · SCHEDULED TIME UNKNOWN
Today

B6 345 · BOS → BCN

took off 8:42 PM ET · expected to land 9:05 AM CEST (scheduled time unknown)
Forecast issued Mon 8:00 PM ET · 1h before departure

Odds over time

Arrive at BCN more than 15 minutes late?
37% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 25% 50% 75% 100% 10h 6h Now Departs Lands