Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
JETBLUE · FLIGHT B6 861
SCHEDULED · TYPICAL SCHEDULE
B6 861 · BOS → SJU
departs 10:10 AM ET · arrives 2:11 PM AT
Forecast issued Wed 5:00 AM ET · 53h before departure
Odds over time
Arrive at SJU more than 15 minutes late?
33%
chance · ±5 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
-
-
-
-
How late will it get to SJU?
-
On time or early
67%
-
15–30 min late
17%
-
30 min–1 hour late
7%
-
1–2 hours late
5%
-
Over 2 hours late
4%
-
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.