Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4533
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
WN 4533 · LAS → SMF
departs 12:35 PM PT · arrives 2:10 PM PT
Forecast issued Tue 4:00 PM ET · 48h before departure
Watch this flight
Other days
Thu 10/1
Fri 10/2 27%
Mon 10/5 22%
Odds over time
Arrive at SMF more than 15 minutes late?
23%
chance · ±5 pts
+1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
23%
Leave 15+ late
30%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
Now
1d
12h
6h
Departs
Lands
Arrive at SMF more than 15 minutes late?
Calm-weather odds: 22% · changed +1 pt in 24h
+1 pt
23%
Yes 23%
No 77%
Leave LAS more than 15 minutes late?
Calm-weather odds: 28% · changed +0 pts in 24h
+0 pts
30%
Yes 30%
No 70%
Arrive at SMF more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
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 SMF?
On time or early
77%
15–30 min late
7%
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
↑
12pm departures from LAS are often late
↑
LAS is prone to delays
↑
WN's recent on-time record
↓
Mostly benign weather forecast at LAS
↓
Mostly benign weather forecast at SMF
Weather at each end
LAS (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
SMF (destination)
Gusts 4 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.