Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
JETBLUE · FLIGHT B6 561
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
B6 561 · BOS → SJU
departs 4:50 PM ET · arrives 8:56 PM AT
Forecast issued Wed 8:00 PM ET · 3h after departure
Watch this flight
Other days
Today
Thu 10/1 53%
Fri 10/2 52%
Sat 10/3 33%
Sun 10/4 47%
Mon 10/5 40%
Tue 10/6 37%
Odds over time
Arrive at SJU more than 15 minutes late?
48%
chance · ±2 pts
+9 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
48%
Leave 15+ late
45%
Arrive 1h+ late
14%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.7d
2d
1d
12h
6h
Departs
Lands
Arrive at SJU more than 15 minutes late?
Calm-weather odds: 50% · changed +9 pts in 24h
+9 pts
48%
Yes 48%
No 52%
Leave BOS more than 15 minutes late?
Calm-weather odds: 45% · changed +3 pts in 24h
+3 pts
45%
Yes 45%
No 55%
Arrive at SJU more than an hour late?
Calm-weather odds: 13% · changed +1 pt in 24h
+1 pt
14%
Yes 14%
No 86%
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
52%
15–30 min late
12%
30 min–1 hour late
22%
1–2 hours late
8%
Over 2 hours late
6%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
4pm departures from BOS are often late
↑
B6's recent on-time record
↑
This flight has been late 43% of the time recently
↓
Wednesdays in September are usually quieter than average
Weather at each end
BOS (origin)
Gusts 8 kt Ceiling 700 ft Visibility 2 mi Precip 0.02 in
SJU (destination)
Gusts 24 kt Ceiling none (clear) Visibility 10+ mi Precip 0.08 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.