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.

AVIANCA EL SALVADOR · FLIGHT TA 444 SCHEDULED · SCHEDULED TIME UNKNOWN
Today

TA 444 · SAL → BOS

departs 9:26 AM CST · arrives 3:00 PM ET
Your aircraft is N902AV (A20N), coming in as LR 661 from JFK: still at JFK, due off about 4:46 PM ET, 787 min before departure.
Forecast issued Mon 6:00 AM ET · 4h before departure

Odds over time

Arrive at BOS more than 15 minutes late?
14% chance · ±0 pts −5 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% 10% 20% 30% 40% 1.4d 1d 12h 6h Now Departs Lands