Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 12
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 12 · STL → PHX
departs 9:40 AM CT · arrives 10:50 AM MT
Forecast issued Wed 8:00 AM ET · 3h before departure
Watch this flight
Other days
Today
Tue 10/6 8%
Odds over time
Arrive at PHX more than 15 minutes late?
14%
chance · ±0 pts
+6 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
14%
Leave 15+ late
13%
Arrive 1h+ late
2%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.9d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at PHX more than 15 minutes late?
Calm-weather odds: 11% · changed +6 pts in 24h
+6 pts
14%
Yes 14%
No 86%
Leave STL more than 15 minutes late?
Calm-weather odds: 9% · changed +5 pts in 24h
+5 pts
13%
Yes 13%
No 87%
Arrive at PHX more than an hour late?
Calm-weather odds: 2% · 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 100%
How late will it get to PHX?
On time or early
86%
15–30 min late
10%
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
↑
This flight has been late 21% of the time recently
↑
PHX is prone to delays
↑
PHX is busy at that time
↓
Mostly benign weather forecast at PHX
↓
Wednesdays in September are usually quieter than average
Weather at each end
STL (origin)
Gusts 14 kt Ceiling 9,000 ft Visibility 10+ mi Precip none
PHX (destination)
Gusts 6 kt Ceiling 11,000 ft 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.