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.
DELTA · FLIGHT DL 1966
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
DL 1966 · JFK → SJU
departs 8:00 AM ET · arrives 12:00 PM AT
Forecast issued Wed 10:00 AM ET · 22h before departure
Watch this flight
Other days
Today 16%
Thu 10/1
Fri 10/2 10%
Sat 10/3 10%
Sun 10/4 16%
Mon 10/5 11%
Tue 10/6 12%
Odds over time
Arrive at SJU more than 15 minutes late?
11%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
11%
Leave 15+ late
10%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.8d
2d
Now
12h
6h
Departs
Lands
Arrive at SJU more than 15 minutes late?
Calm-weather odds: 9% · changed +2 pts in 24h
+2 pts
11%
Yes 11%
No 89%
Leave JFK more than 15 minutes late?
Calm-weather odds: 9% · changed +1 pt in 24h
+1 pt
10%
Yes 10%
No 90%
Arrive at SJU more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
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
88%
15–30 min late
5%
30 min–1 hour late
4%
1–2 hours late
2%
Over 2 hours late
<1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Mostly benign weather forecast at SJU
↑
8am departures from JFK are often late
↑
This flight has been late 20% of the time recently
↓
Mostly benign weather forecast at JFK
↓
Early flights usually leave on time
Weather at each end
JFK (origin)
Gusts 11 kt Ceiling 7,000 ft Visibility 10+ mi Precip none
SJU (destination)
Gusts 15 kt Ceiling 1,800 ft Visibility 10+ mi Precip 0.18 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.