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 1577 LANDED 9:23 AM PT, ~7 MIN LATE · SCHEDULED TIME UNKNOWN

B6 1577 · BOS → LAS

took off 7:19 AM ET · landed 9:23 AM PT (scheduled time unknown)
Forecast issued Wed 10:00 PM ET · 15h after departure

Odds over time

Arrive at LAS more than 15 minutes late?
30% chance · ±0 pts +4 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 10% 20% 30% 40% 1.1d 12h 6h Departs Lands