Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3354
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
WN 3354 · PHX → STL
departs 8:55 PM MT · arrives 1:55 AM CT
Forecast issued Sun 5:00 AM ET · 43h before departure
Watch this flight
Other days
Mon 10/5
Fri 10/9 32%
Odds over time
Arrive at STL more than 15 minutes late?
23%
chance · ±3 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
23%
Leave 15+ late
38%
Arrive 1h+ late
8%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
7.0d
Now
1d
12h
6h
Departs
Lands
Arrive at STL more than 15 minutes late?
Calm-weather odds: 20% · changed −1 pt in 24h
−1 pt
23%
Yes 23%
No 77%
Leave PHX more than 15 minutes late?
Calm-weather odds: 35% · changed +0 pts in 24h
+0 pts
38%
Yes 38%
No 62%
Arrive at STL more than an hour late?
Calm-weather odds: 6% · changed +1 pt in 24h
+1 pt
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to STL?
On time or early
77%
15–30 min late
3%
30 min–1 hour late
13%
1–2 hours late
7%
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
↑
8pm departures from PHX are often late
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into STL at that hour are often late
↓
Mondays in October are usually quieter than average
↓
Mostly benign weather forecast at STL
Weather at each end
PHX (origin)
Gusts 22 kt Ceiling none (clear) Visibility 10+ mi Precip none
STL (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.