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 2015
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 2015 · LAS → ONT
departs 7:20 PM PT · arrives 8:20 PM PT
Forecast issued Wed 1:00 AM ET · 21h before departure
Watch this flight
Other days
Today
Tue 10/6 17%
Odds over time
Arrive at ONT more than 15 minutes late?
30%
chance · ±3 pts
+8 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
30%
Leave 15+ late
35%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
Now
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 25% · changed +8 pts in 24h
+8 pts
30%
Yes 30%
No 70%
Leave LAS more than 15 minutes late?
Calm-weather odds: 32% · changed +5 pts in 24h
+5 pts
35%
Yes 35%
No 65%
Arrive at ONT more than an hour late?
Calm-weather odds: 5% · changed +1 pt in 24h
+1 pt
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to ONT?
On time or early
70%
15–30 min late
14%
30 min–1 hour late
9%
1–2 hours late
4%
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
↑
7pm departures from LAS are often late
↑
Later flights pick up delays from earlier in the day
↑
LAS is prone to delays
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at LAS
Weather at each end
LAS (origin)
Gusts 16 kt Ceiling none (clear) Visibility 10+ mi Precip none
ONT (destination)
Gusts 17 kt Ceiling none (clear) Visibility 8 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.