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.

EL AL · FLIGHT LY 15 IN THE AIR (OFF 1:18 AM IST, ETA 4:52 AM ET) · SCHEDULED TIME UNKNOWN
Today

LY 15 · TLV → BOS

took off 1:18 AM IST · expected to land 4:52 AM ET (scheduled time unknown)
Forecast issued Mon 3:00 AM ET · 9h after departure

Odds over time

Arrive at BOS more than 15 minutes late?
14% chance · ±0 pts +3 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 5% 10% 15% 20% 17h 12h 6h Departs Lands