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 3306
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Tomorrow
WN 3306 · STL → PHX
departs 6:20 PM CT · arrives 7:30 PM MT
Forecast issued Tue 7:00 PM ET · 24h before departure
Watch this flight
Other days
Today 25%
Wed 9/30
Sun 10/4 15%
Odds over time
Arrive at PHX more than 15 minutes late?
18%
chance · ±2 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
18%
Leave 15+ late
31%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
Now
12h
6h
Departs
Lands
Arrive at PHX more than 15 minutes late?
Calm-weather odds: 20% · changed −1 pt in 24h
−1 pt
18%
Yes 18%
No 82%
Leave STL more than 15 minutes late?
Calm-weather odds: 30% · changed +5 pts in 24h
+5 pts
31%
Yes 31%
No 69%
Arrive at PHX more than an hour late?
Calm-weather odds: 5% · changed +1 pt in 24h
+1 pt
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 PHX?
On time or early
82%
15–30 min late
10%
30 min–1 hour late
2%
1–2 hours late
4%
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
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into PHX at that hour are often late
↑
6pm departures from STL are often late
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at PHX
Weather at each end
STL (origin)
Gusts 13 kt Ceiling 10,000 ft Visibility 10+ mi Precip none
PHX (destination)
Gusts 9 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.