Schedule: a typical summer Thursday (the flights of Jul 30, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3808
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Yesterday
WN 3808 · SMF → ONT
departs 4:15 PM PT · arrives 5:35 PM PT
Forecast issued Thu 10:00 PM ET · 3h after departure
Watch this flight
Other days
Thu 10/1
Today 40%
Mon 10/5 21%
Odds over time
Arrive at ONT more than 15 minutes late?
25%
chance · ±1 pts
−3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
25%
Leave 15+ late
39%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
12h
6h
Departs
Lands
Now
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 25% · changed −3 pts in 24h
−3 pts
25%
Yes 25%
No 75%
Leave SMF more than 15 minutes late?
Calm-weather odds: 42% · changed −4 pts in 24h
−4 pts
39%
Yes 39%
No 61%
Arrive at ONT more than an hour late?
Calm-weather odds: 6% · 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
75%
15–30 min late
10%
30 min–1 hour late
8%
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
↑
WN's recent on-time record
↑
Later flights pick up delays from earlier in the day
↑
4pm departures from SMF are often late
↓
Mostly benign weather forecast at ONT
↓
Mostly benign weather forecast at SMF
Weather at each end
SMF (origin)
Gusts 5 kt Ceiling none (clear) Visibility 9 mi Precip none
ONT (destination)
Gusts 18 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.