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 20 LANDED 2:32 PM ET, ~14 MIN LATE · SCHEDULED TIME UNKNOWN

B6 20 · LHR → JFK

took off 12:16 PM BST · landed 2:32 PM ET (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 15h after departure

Odds over time

Arrive at JFK more than 15 minutes late?
15% chance · ±0 pts +4 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 5% 10% 15% 20% 6h Departs Lands