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 634
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Yesterday
B6 634 · SJU → BUF
departs 6:29 PM AT · arrives 11:07 PM ET
Forecast issued Wed 10:00 PM ET · 4h after departure
Watch this flight
Other days
Wed 9/30
Fri 10/2 25%
Sat 10/3 30%
Mon 10/5 21%
Wed 10/7 20%
Odds over time
Arrive at BUF more than 15 minutes late?
19%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
19%
Leave 15+ late
30%
Arrive 1h+ late
11%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.7d
2d
1d
12h
6h
Departs
Lands
Arrive at BUF more than 15 minutes late?
Calm-weather odds: 22% · changed +2 pts in 24h
+2 pts
19%
Yes 19%
No 81%
Leave SJU more than 15 minutes late?
Calm-weather odds: 28% · changed +0 pts in 24h
+0 pts
30%
Yes 30%
No 70%
Arrive at BUF more than an hour late?
Calm-weather odds: 10% · changed +0 pts in 24h
+0 pts
11%
Yes 11%
No 89%
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
80%
15–30 min late
3%
30 min–1 hour late
5%
1–2 hours late
7%
Over 2 hours late
4%
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
↑
Mostly benign weather forecast at SJU
↑
Later flights pick up delays from earlier in the day
↓
Wednesdays in September are usually quieter than average
↓
BUF usually runs smoothly
Weather at each end
SJU (origin)
Gusts 24 kt Ceiling none (clear) Visibility 10+ mi Precip 0.07 in
BUF (destination)
Gusts 20 kt Ceiling 9,000 ft Visibility 8 mi Precip none
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.