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 · JFK → SJU
departs 8:00 AM ET · arrives 12:00 PM AT
Forecast issued Thu 1:00 AM ET · 55h before departure
Watch this flight
Other days
Today 13%
Fri 10/2 9%
Sat 10/3
Sun 10/4 16%
Mon 10/5 11%
Tue 10/6 12%
Wed 10/7 12%
Odds over time
Arrive at SJU more than 15 minutes late?
13%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
13%
Leave 15+ late
9%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
4.4d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at SJU more than 15 minutes late?
Calm-weather odds: 8% · changed – in 24h
–
13%
Yes 13%
No 87%
Leave JFK more than 15 minutes late?
Calm-weather odds: 8% · changed – in 24h
–
9%
Yes 9%
No 91%
Arrive at SJU 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 SJU?
On time or early
86%
15–30 min late
6%
30 min–1 hour late
5%
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
↑
SJU is prone to delays
↑
Mostly benign weather forecast at SJU
↑
JFK is prone to delays
↓
DL's recent on-time record
↓
Early flights usually leave on time
Weather at each end
JFK (origin)
Gusts 16 kt Ceiling 7,333 ft Visibility 10+ mi Precip 0.04 in
SJU (destination)
Gusts 13 kt Ceiling 4,100 ft Visibility 10+ mi Precip 0.10 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.