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 3913
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
WN 3913 · STL → DEN
departs 6:40 PM CT · arrives 8:00 PM MT
Forecast issued Wed 4:00 AM ET · 40h before departure
Watch this flight
Other days
Today 47%
Thu 10/1
Fri 10/2 32%
Sun 10/4 30%
Mon 10/5 24%
Tue 10/6 22%
Odds over time
Arrive at DEN more than 15 minutes late?
44%
chance · ±4 pts
+5 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
44%
Leave 15+ late
48%
Arrive 1h+ late
13%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 19% · changed +5 pts in 24h
+5 pts
44%
Yes 44%
No 56%
Leave STL more than 15 minutes late?
Calm-weather odds: 32% · changed +3 pts in 24h
+3 pts
48%
Yes 48%
No 52%
Arrive at DEN more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
13%
Yes 13%
No 87%
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
55%
15–30 min late
20%
30 min–1 hour late
11%
1–2 hours late
10%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 600 ft, 0.3 in of rain forecast at STL that day
↑
Arrivals into DEN at that hour are often late
↑
Later flights pick up delays from earlier in the day
↓
Thursdays in October are usually quieter than average
↓
STL usually runs smoothly
Weather at each end
STL (origin)
Gusts 16 kt Ceiling 600 ft Visibility 3 mi Precip 0.26 in
DEN (destination)
Gusts 22 kt Ceiling 9,000 ft Visibility 7 mi Precip 0.03 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.