Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4345
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 4345 · SAN → LAS
departs 5:45 PM PT · arrives 7:05 PM PT
Forecast issued Tue 5:00 PM ET · 4h before departure
Watch this flight
Other days
Today
Wed 9/30 31%
Odds over time
Arrive at LAS more than 15 minutes late?
47%
chance · ±1 pts
+17 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
47%
Leave 15+ late
42%
Arrive 1h+ late
15%
Cancelled
3%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.9d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 46% · changed +17 pts in 24h
+17 pts
47%
Yes 47%
No 53%
Leave SAN more than 15 minutes late?
Calm-weather odds: 42% · changed +12 pts in 24h
+12 pts
42%
Yes 42%
No 58%
Arrive at LAS more than an hour late?
Calm-weather odds: 14% · changed +9 pts in 24h
+9 pts
15%
Yes 15%
No 85%
Cancelled?
Calm-weather odds: 2% · changed +2 pts in 24h
+2 pts
3%
Yes 3%
No 97%
How late will it get to LAS?
On time or early
51%
15–30 min late
9%
30 min–1 hour late
23%
1–2 hours late
11%
Over 2 hours late
3%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Gusts to 27 kt forecast at LAS that day
↑
LAS is prone to delays
↑
Arrivals into LAS at that hour are often late
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at SAN
Weather at each end
SAN (origin)
Gusts 9 kt Ceiling 2,300 ft Visibility 10+ mi Precip none
LAS (destination)
Gusts 27 kt Ceiling 4,700 ft Visibility 7 mi Precip 0.09 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.