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 1091
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
DL 1091 · SLC → SFO
departs 10:50 PM MT · arrives 11:52 PM PT
Forecast issued Thu 12:00 AM ET · 25h before departure
Watch this flight
Other days
Today
Fri 10/2 15%
Sun 10/4 21%
Mon 10/5 18%
Tue 10/6 13%
Wed 10/7 16%
Odds over time
Arrive at SFO more than 15 minutes late?
19%
chance · ±6 pts
+4 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
19%
Leave 15+ late
24%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
Now
12h
6h
Departs
Lands
Arrive at SFO more than 15 minutes late?
Calm-weather odds: 18% · changed +4 pts in 24h
+4 pts
19%
Yes 19%
No 81%
Leave SLC more than 15 minutes late?
Calm-weather odds: 24% · changed +6 pts in 24h
+6 pts
24%
Yes 24%
No 76%
Arrive at SFO more than an hour late?
Calm-weather odds: 5% · changed +1 pt in 24h
+1 pt
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SFO?
On time or early
81%
15–30 min late
4%
30 min–1 hour late
8%
1–2 hours late
4%
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 SFO at that hour are often late
↑
This flight has been late 33% of the time recently
↑
Later flights pick up delays from earlier in the day
↓
Cloud base down to 500 ft forecast at SFO that day
↓
Mostly benign weather forecast at SLC
Weather at each end
SLC (origin)
Gusts 11 kt Ceiling none (clear) Visibility 10+ mi Precip none
SFO (destination)
Gusts 11 kt Ceiling 500 ft Visibility 7 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.