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 3146
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 3146 · ONT → DEN
departs 1:20 PM PT · arrives 4:35 PM MT
Forecast issued Wed 2:00 AM ET · 14h before departure
Watch this flight
Other days
Today
Thu 10/1 28%
Fri 10/2 25%
Mon 10/5 21%
Tue 10/6 19%
Odds over time
Arrive at DEN more than 15 minutes late?
51%
chance · ±6 pts
−17 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
51%
Leave 15+ late
43%
Arrive 1h+ late
16%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
25%
50%
75%
100%
2.8d
2d
1d
Now
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 16% · changed −17 pts in 24h
−17 pts
51%
Yes 51%
No 49%
Leave ONT more than 15 minutes late?
Calm-weather odds: 22% · changed −12 pts in 24h
−12 pts
43%
Yes 43%
No 57%
Arrive at DEN more than an hour late?
Calm-weather odds: 3% · changed −8 pts in 24h
−8 pts
16%
Yes 16%
No 84%
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
48%
15–30 min late
12%
30 min–1 hour late
23%
1–2 hours late
11%
Over 2 hours late
5%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
0.3 in of rain forecast at DEN that day
↑
Arrivals into DEN at that hour are often late
↑
This flight has been late 38% of the time recently
↓
Wednesdays in September are usually quieter than average
↓
ONT usually runs smoothly
Weather at each end
ONT (origin)
Gusts 17 kt Ceiling none (clear) Visibility 8 mi Precip none
DEN (destination)
Gusts 19 kt Ceiling 4,500 ft Visibility 8 mi Precip 0.34 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.