Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
DELTA · FLIGHT DL 1581
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
DL 1581 · DEN → SLC
departs 7:05 AM MT · arrives 8:36 AM MT
Forecast issued Fri 9:00 PM ET · 12h after departure
Watch this flight
Other days
Today
Sat 10/3 10%
Sun 10/4 7%
Mon 10/5 6%
Tue 10/6 5%
Wed 10/7 5%
Thu 10/8 4%
Odds over time
Arrive at SLC more than 15 minutes late?
7%
chance · ±0 pts
−9 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
7%
Leave 15+ late
6%
Arrive 1h+ late
2%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
3.5d
2d
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 7% · changed −9 pts in 24h
−9 pts
7%
Yes 7%
No 93%
Leave DEN more than 15 minutes late?
Calm-weather odds: 6% · changed −13 pts in 24h
−13 pts
6%
Yes 6%
No 94%
Arrive at SLC more than an hour late?
Calm-weather odds: 2% · changed −2 pts in 24h
−2 pts
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to SLC?
On time or early
92%
15–30 min late
3%
30 min–1 hour late
2%
1–2 hours late
1%
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
↑
DEN is busy at that time
↑
Other factors
↓
Early flights usually leave on time
↓
Gusts to 29 kt forecast at DEN that day
Weather at each end
DEN (origin)
Gusts 17 kt Ceiling none (clear) Visibility 10+ mi Precip none
SLC (destination)
Gusts 10 kt Ceiling none (clear) Visibility 9 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.