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 3172
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
DL 3172 · ONT → SLC
departs 1:00 PM PT · arrives 3:47 PM MT
Forecast issued Wed 8:00 AM ET · 32h before departure
Watch this flight
Other days
Today 11%
Thu 10/1
Fri 10/2 8%
Sat 10/3 8%
Sun 10/4 11%
Mon 10/5 8%
Tue 10/6 6%
Odds over time
Arrive at SLC more than 15 minutes late?
6%
chance · ±1 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
6%
Leave 15+ late
6%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
3%
6%
9%
12%
2.8d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 6% · changed −1 pt in 24h
−1 pt
6%
Yes 6%
No 94%
Leave ONT more than 15 minutes late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
6%
Yes 6%
No 94%
Arrive at SLC more than an hour late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SLC?
On time or early
93%
15–30 min late
<1%
30 min–1 hour late
2%
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
↑
Other factors
↓
This flight has been late 13% of the time recently
↓
Mostly benign weather forecast at SLC
Weather at each end
ONT (origin)
Gusts 16 kt Ceiling none (clear) Visibility 5 mi Precip none
SLC (destination)
Gusts 11 kt Ceiling none (clear) 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.