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 3914
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 3914 · STL → DEN
departs 9:15 PM CT · arrives 10:40 PM MT
Forecast issued Wed 9:00 AM ET · 13h before departure
Watch this flight
Other days
Today
Thu 10/1 41%
Fri 10/2 28%
Mon 10/5 21%
Tue 10/6 21%
Odds over time
Arrive at DEN more than 15 minutes late?
27%
chance · ±0 pts
−18 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
27%
Leave 15+ late
30%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
Now
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 15% · changed −18 pts in 24h
−18 pts
27%
Yes 27%
No 73%
Leave STL more than 15 minutes late?
Calm-weather odds: 28% · changed −12 pts in 24h
−12 pts
30%
Yes 30%
No 70%
Arrive at DEN more than an hour late?
Calm-weather odds: 4% · changed −11 pts in 24h
−11 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 100%
How late will it get to DEN?
On time or early
73%
15–30 min late
6%
30 min–1 hour late
17%
1–2 hours late
3%
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
↑
Arrivals into DEN at that hour are often late
↑
9pm departures from STL are often late
↑
Mostly benign weather forecast at DEN
↓
Wednesdays in September are usually quieter than average
↓
STL usually runs smoothly
Weather at each end
STL (origin)
Gusts 14 kt Ceiling 9,000 ft Visibility 10+ mi Precip none
DEN (destination)
Gusts 18 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.07 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.