Schedule: a typical summer Saturday (the flights of Jul 25, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3931
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Tomorrow
WN 3931 · STL → DAL
departs 7:50 PM CT · arrives 9:35 PM CT
Forecast issued Fri 1:00 PM ET · 32h before departure
Watch this flight
Odds over time
Arrive at DAL more than 15 minutes late?
25%
chance · ±4 pts
−3 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
25%
Leave 15+ late
36%
Arrive 1h+ late
9%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.0d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at DAL more than 15 minutes late?
Calm-weather odds: 23% · changed −3 pts in 24h
−3 pts
25%
Yes 25%
No 75%
Leave STL more than 15 minutes late?
Calm-weather odds: 31% · changed +4 pts in 24h
+4 pts
36%
Yes 36%
No 64%
Arrive at DAL more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
1%
Yes 1%
No 99%
How late will it get to DAL?
On time or early
74%
15–30 min late
8%
30 min–1 hour late
9%
1–2 hours late
6%
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 400 ft, 0.4 in of rain forecast at DAL that day
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into DAL at that hour are often late
↓
Mostly benign weather forecast at STL
↓
WN's recent on-time record
Weather at each end
STL (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
DAL (destination)
Gusts 14 kt Ceiling 400 ft Visibility 3 mi Precip 0.43 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.