Schedule: a typical summer Tuesday (the flights of Jul 28, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 1961
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29
DL 1961 · JFK → SJU
departs 12:45 PM ET · arrives 4:38 PM AT
Forecast issued Tue 10:00 PM ET · 9h after departure
Watch this flight
Other days
Tue 9/29
Today 25%
Mon 10/5 12%
Fri 10/9 12%
Odds over time
Arrive at SJU more than 15 minutes late?
11%
chance · ±0 pts
−1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
11%
Leave 15+ late
13%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at SJU more than 15 minutes late?
Calm-weather odds: 11% · changed −1 pt in 24h
−1 pt
11%
Yes 11%
No 89%
Leave JFK more than 15 minutes late?
Calm-weather odds: 13% · changed −1 pt in 24h
−1 pt
13%
Yes 13%
No 87%
Arrive at SJU more than an hour late?
Calm-weather odds: 3% · 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
4%
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
↑
Arrivals into SJU at that hour are often late
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at JFK
Weather at each end
JFK (origin)
Gusts 10 kt Ceiling 1,800 ft Visibility 10+ mi Precip none
SJU (destination)
Gusts 25 kt Ceiling 7,840 ft Visibility 10+ 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.