Schedule: the flights that flew on Sunday, Oct 25, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3955
SCHEDULED · TYPICAL SCHEDULE
Sunday, November 1 Tomorrow
WN 3955 · SMF → ONT
departs 9:19 PM PT · arrives 10:53 PM PT
Forecast issued Sat 7:00 AM ET · 42h before departure
Watch this flight
Other days
Sun 11/1
Mon 11/2 26%
Tue 11/3 24%
Wed 11/4 25%
Thu 11/5 41%
Fri 11/6 42%
Odds over time
Arrive at ONT more than 15 minutes late?
34%
chance · ±3 pts
−5 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
34%
Leave 15+ late
48%
Arrive 1h+ late
11%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
7.0d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 34% · changed −5 pts in 24h
−5 pts
34%
Yes 34%
No 66%
Leave SMF more than 15 minutes late?
Calm-weather odds: 50% · changed −2 pts in 24h
−2 pts
48%
Yes 48%
No 52%
Arrive at ONT more than an hour late?
Calm-weather odds: 10% · changed −2 pts in 24h
−2 pts
11%
Yes 11%
No 89%
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
66%
15–30 min late
7%
30 min–1 hour late
16%
1–2 hours late
8%
Over 2 hours late
3%
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
↑
Arrivals into ONT at that hour are often late
↓
Mostly benign weather forecast at SMF
↓
Sundays in November are usually quieter than average
Weather at each end
SMF (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
ONT (destination)
Gusts 16 kt Ceiling 1,300 ft Visibility 5 mi Precip 0.28 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.