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 1780
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
DL 1780 · SJU → BOS
departs 2:08 PM AT · arrives 6:19 PM ET
Forecast issued Thu 7:00 AM ET · 55h before departure
Watch this flight
Other days
Today 39%
Fri 10/2 19%
Sat 10/3
Sun 10/4 23%
Mon 10/5 22%
Tue 10/6 18%
Wed 10/7 31%
Odds over time
Arrive at BOS more than 15 minutes late?
16%
chance · ±2 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
16%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.7d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at BOS more than 15 minutes late?
Calm-weather odds: 13% · changed – in 24h
–
16%
Yes 16%
No 84%
Leave SJU more than 15 minutes late?
Calm-weather odds: 13% · changed – in 24h
–
16%
Yes 16%
No 84%
Arrive at BOS more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to BOS?
On time or early
84%
15–30 min late
2%
30 min–1 hour late
7%
1–2 hours late
5%
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
↑
Arrivals into BOS at that hour are often late
↑
Later flights pick up delays from earlier in the day
↑
Mostly benign weather forecast at SJU
↓
DL's recent on-time record
↓
Mostly benign weather forecast at BOS
Weather at each end
SJU (origin)
Gusts 13 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.10 in
BOS (destination)
Gusts 12 kt Ceiling 11,333 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.