Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
DELTA · FLIGHT DL 1966
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
DL 1966 · SJU → JFK
departs 1:10 PM AT · arrives 5:19 PM ET
Forecast issued Thu 7:00 AM ET · 54h before departure
Watch this flight
Other days
Today 21%
Fri 10/2 11%
Sat 10/3
Sun 10/4 15%
Mon 10/5 14%
Tue 10/6 9%
Wed 10/7 13%
Odds over time
Arrive at JFK more than 15 minutes late?
10%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
10%
Leave 15+ late
11%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
4.6d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at JFK more than 15 minutes late?
Calm-weather odds: 8% · changed – in 24h
–
10%
Yes 10%
No 90%
Leave SJU more than 15 minutes late?
Calm-weather odds: 8% · changed – in 24h
–
11%
Yes 11%
No 89%
Arrive at JFK more than an hour late?
Calm-weather odds: 2% · changed – in 24h
–
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to JFK?
On time or early
89%
15–30 min late
2%
30 min–1 hour late
4%
1–2 hours late
2%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Early flights usually leave on time
↑
Arrivals into JFK at that hour are often late
↓
DL's recent on-time record
↓
Mostly benign weather forecast at JFK
Weather at each end
SJU (origin)
Gusts 13 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.10 in
JFK (destination)
Gusts 15 kt Ceiling 4,267 ft Visibility 10+ mi Precip 0.03 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.