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 3940
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Tomorrow
WN 3940 · DAL → SAT
departs 12:15 PM CT · arrives 1:20 PM CT
Forecast issued Fri 9:00 AM ET · 28h before departure
Watch this flight
Other days
Today 58%
Sat 10/3
Sun 10/4 33%
Mon 10/5 19%
Odds over time
Arrive at SAT more than 15 minutes late?
39%
chance · ±3 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
39%
Leave 15+ late
35%
Arrive 1h+ late
7%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
4.6d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SAT more than 15 minutes late?
Calm-weather odds: 13% · changed +0 pts in 24h
+0 pts
39%
Yes 39%
No 61%
Leave DAL more than 15 minutes late?
Calm-weather odds: 15% · changed +0 pts in 24h
+0 pts
35%
Yes 35%
No 65%
Arrive at SAT more than an hour late?
Calm-weather odds: 3% · changed +1 pt in 24h
+1 pt
7%
Yes 7%
No 93%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to SAT?
On time or early
60%
15–30 min late
17%
30 min–1 hour late
14%
1–2 hours late
3%
Over 2 hours late
4%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 400 ft, 0.8 in of rain forecast at DAL that day
↑
Cloud base down to 700 ft forecast at SAT that day
↑
DAL is prone to delays
↓
WN's recent on-time record
↓
Arrivals into SAT at that hour are usually not late
Weather at each end
DAL (origin)
Gusts 14 kt Ceiling 400 ft Visibility 3 mi Precip 0.43 in
SAT (destination)
Gusts 20 kt Ceiling 800 ft Visibility 7 mi Precip 0.15 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.