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 4342
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
WN 4342 · LAS → SAN
departs 6:05 AM PT · arrives 7:15 AM PT
Forecast issued Tue 9:00 PM ET · 36h before departure
Watch this flight
Other days
Today 10%
Wed 9/30 10%
Thu 10/1
Fri 10/2 9%
Mon 10/5 9%
Odds over time
Arrive at SAN more than 15 minutes late?
8%
chance · ±2 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
8%
Leave 15+ late
3%
Arrive 1h+ late
2%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SAN more than 15 minutes late?
Calm-weather odds: 6% · changed −1 pt in 24h
−1 pt
8%
Yes 8%
No 92%
Leave LAS more than 15 minutes late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Arrive at SAN more than an hour late?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SAN?
On time or early
91%
15–30 min late
4%
30 min–1 hour late
2%
1–2 hours late
1%
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
↑
SAN is prone to delays
↑
This flight has been late 16% of the time recently
↑
Other factors
↓
Early flights usually leave on time
↓
6am departures from LAS are usually not late
Weather at each end
LAS (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
SAN (destination)
Gusts 14 kt Ceiling 500 ft Visibility 7 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.