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 3910
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
WN 3910 · STL → DEN
departs 9:25 AM CT · arrives 10:40 AM MT
Forecast issued Wed 4:00 PM ET · 18h before departure
Watch this flight
Other days
Today 10%
Thu 10/1
Fri 10/2 13%
Sun 10/4 8%
Mon 10/5 11%
Tue 10/6 7%
Odds over time
Arrive at DEN more than 15 minutes late?
16%
chance · ±2 pts
+1 pt · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
13%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 9% · changed +1 pt in 24h
+1 pt
16%
Yes 16%
No 84%
Leave STL more than 15 minutes late?
Calm-weather odds: 10% · changed +1 pt in 24h
+1 pt
13%
Yes 13%
No 87%
Arrive at DEN more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to DEN?
On time or early
84%
15–30 min late
5%
30 min–1 hour late
7%
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
↑
Cloud base down to 967 ft, 0.3 in of rain forecast at STL that day
↑
DEN is busy at that time
↓
Early flights usually leave on time
↓
Thursdays in October are usually quieter than average
Weather at each end
STL (origin)
Gusts 17 kt Ceiling 967 ft Visibility 6 mi Precip 0.32 in
DEN (destination)
Gusts 21 kt Ceiling 7,000 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.