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 1623
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
DL 1623 · SLC → DEN
departs 1:20 PM MT · arrives 2:53 PM MT
Forecast issued Wed 4:00 AM ET · 35h before departure
Watch this flight
Other days
Today 50%
Thu 10/1
Fri 10/2 19%
Sat 10/3 12%
Sun 10/4 20%
Mon 10/5 15%
Tue 10/6 12%
Odds over time
Arrive at DEN more than 15 minutes late?
15%
chance · ±4 pts
−4 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
15%
Leave 15+ late
11%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 11% · changed −4 pts in 24h
−4 pts
15%
Yes 15%
No 85%
Leave SLC more than 15 minutes late?
Calm-weather odds: 9% · changed −2 pts in 24h
−2 pts
11%
Yes 11%
No 89%
Arrive at DEN more than an hour late?
Calm-weather odds: 3% · changed −3 pts in 24h
−3 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 DEN?
On time or early
84%
15–30 min late
6%
30 min–1 hour late
6%
1–2 hours late
2%
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
↑
Early flights usually leave on time
↑
Arrivals into DEN at that hour are often late
↑
DEN is busy at that time
↓
Mostly benign weather forecast at SLC
↓
Thursdays in October are usually quieter than average
Weather at each end
SLC (origin)
Gusts 11 kt Ceiling none (clear) Visibility 10+ mi Precip none
DEN (destination)
Gusts 22 kt Ceiling 9,000 ft Visibility 7 mi Precip 0.03 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.