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 4223
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
WN 4223 · LAS → SJC
departs 12:45 PM PT · arrives 2:20 PM PT
Forecast issued Thu 12:00 AM ET · 16h before departure
Watch this flight
Other days
Today
Fri 10/2 18%
Mon 10/5 16%
Odds over time
Arrive at SJC more than 15 minutes late?
19%
chance · ±2 pts
+3 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
19%
Leave 15+ late
24%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at SJC more than 15 minutes late?
Calm-weather odds: 16% · changed +3 pts in 24h
+3 pts
19%
Yes 19%
No 81%
Leave LAS more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
24%
Yes 24%
No 76%
Arrive at SJC more than an hour late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SJC?
On time or early
81%
15–30 min late
8%
30 min–1 hour late
7%
1–2 hours late
3%
Over 2 hours late
1%
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
↓
Thursdays in October are usually quieter than average
Weather at each end
LAS (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
SJC (destination)
Gusts 11 kt Ceiling 100 ft Visibility 1 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.