Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
JETBLUE · FLIGHT B6 861
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
B6 861 · BOS → SJU
departs 10:10 AM ET · arrives 2:11 PM AT
Forecast issued Wed 2:00 AM ET · 32h before departure
Watch this flight
Other days
Today 26%
Thu 10/1
Fri 10/2 33%
Sat 10/3 27%
Sun 10/4 30%
Mon 10/5 33%
Tue 10/6 27%
Odds over time
Arrive at SJU more than 15 minutes late?
31%
chance · ±2 pts
+4 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
31%
Leave 15+ late
28%
Arrive 1h+ late
8%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.7d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SJU more than 15 minutes late?
Calm-weather odds: 25% · changed +4 pts in 24h
+4 pts
31%
Yes 31%
No 69%
Leave BOS more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
28%
Yes 28%
No 72%
Arrive at SJU more than an hour late?
Calm-weather odds: 6% · changed +1 pt in 24h
+1 pt
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SJU?
On time or early
68%
15–30 min late
13%
30 min–1 hour late
10%
1–2 hours late
4%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
B6's recent on-time record
↑
This flight has been late 24% of the time recently
↑
Arrivals into SJU at that hour are often late
↓
Thursdays in October are usually quieter than average
↓
Early flights usually leave on time
Weather at each end
BOS (origin)
Gusts 16 kt Ceiling none (clear) Visibility 0.8 mi Precip none
SJU (destination)
Gusts 16 kt Ceiling 1,400 ft Visibility 10+ mi Precip 0.10 in
How this resolves
Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.
Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.