Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
JETBLUE · FLIGHT B6 634
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
B6 634 · SJU → BUF
departs 6:29 PM AT · arrives 11:07 PM ET
Forecast issued Fri 2:00 AM ET · 16h before departure
Watch this flight
Other days
Today
Sat 10/3 30%
Mon 10/5 21%
Wed 10/7 20%
Odds over time
Arrive at BUF more than 15 minutes late?
26%
chance · ±4 pts
+0 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
26%
Leave 15+ late
31%
Arrive 1h+ late
12%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
3.9d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at BUF more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
26%
Yes 26%
No 74%
Leave SJU more than 15 minutes late?
Calm-weather odds: 28% · changed +0 pts in 24h
+0 pts
31%
Yes 31%
No 69%
Arrive at BUF more than an hour late?
Calm-weather odds: 10% · changed +1 pt in 24h
+1 pt
12%
Yes 12%
No 88%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to BUF?
On time or early
73%
15–30 min late
7%
30 min–1 hour late
7%
1–2 hours late
9%
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
↑
Later flights pick up delays from earlier in the day
↑
Mostly benign weather forecast at SJU
↓
SJU usually runs smoothly
↓
Fridays in October are usually quieter than average
Weather at each end
SJU (origin)
Gusts 15 kt Ceiling none (clear) Visibility 10+ mi Precip 0.12 in
BUF (destination)
Gusts 12 kt Ceiling 600 ft Visibility 4 mi Precip 0.74 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.