Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3145
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 3145 · ONT → DEN
departs 8:15 AM PT · arrives 11:25 AM MT
Forecast issued Wed 9:00 PM ET · 10h after departure
Watch this flight
Other days
Today
Thu 10/1 13%
Fri 10/2 8%
Sat 10/3 8%
Sun 10/4 11%
Mon 10/5 9%
Tue 10/6 8%
Odds over time
Arrive at DEN more than 15 minutes late?
7%
chance · ±0 pts
−11 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%
15%
30%
45%
60%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 7% · changed −11 pts in 24h
−11 pts
7%
Yes 7%
No 93%
Leave ONT more than 15 minutes late?
Calm-weather odds: 6% · changed −3 pts in 24h
−3 pts
6%
Yes 6%
No 94%
Arrive at DEN 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 99%
How late will it get to DEN?
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
↓
Mostly benign weather forecast at ONT
↓
Wednesdays in September are usually quieter than average
Weather at each end
ONT (origin)
Gusts 18 kt Ceiling none (clear) Visibility 10+ mi Precip none
DEN (destination)
Gusts 20 kt Ceiling 8,000 ft Visibility 10+ 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.