Schedule: a typical summer Friday (the flights of Jul 31, 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
Friday, October 2 Today
WN 3808 · SMF → ONT
departs 4:15 PM PT · arrives 5:35 PM PT
Forecast issued Fri 5:00 PM ET · 2h before departure
Watch this flight
Other days
Today
Mon 10/5 21%
Odds over time
Arrive at ONT more than 15 minutes late?
29%
chance · ±0 pts
+1 pt · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
29%
Leave 15+ late
33%
Arrive 1h+ late
5%
Cancelled
4%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.9d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 25% · changed +1 pt in 24h
+1 pt
29%
Yes 29%
No 71%
Leave SMF more than 15 minutes late?
Calm-weather odds: 37% · changed −5 pts in 24h
−5 pts
33%
Yes 33%
No 67%
Arrive at ONT more than an hour late?
Calm-weather odds: 6% · changed −1 pt in 24h
−1 pt
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +3 pts in 24h
+3 pts
4%
Yes 4%
No 96%
How late will it get to ONT?
On time or early
69%
15–30 min late
15%
30 min–1 hour late
8%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
4%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Later flights pick up delays from earlier in the day
↑
WN's recent on-time record
↑
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 6 kt Ceiling none (clear) Visibility 10+ mi Precip none
ONT (destination)
Gusts 10 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.