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 3988
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Tomorrow
WN 3988 · STL → VPS
departs 6:05 PM CT · arrives 7:55 PM CT
Forecast issued Fri 8:00 PM ET · 23h before departure
Watch this flight
Other days
Today 28%
Sat 10/3
Mon 10/5 17%
Odds over time
Arrive at VPS more than 15 minutes late?
26%
chance · ±3 pts
+2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
26%
Leave 15+ late
24%
Arrive 1h+ late
9%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.9d
2d
Now
12h
6h
Departs
Lands
Arrive at VPS more than 15 minutes late?
Calm-weather odds: 17% · changed +2 pts in 24h
+2 pts
26%
Yes 26%
No 74%
Leave STL more than 15 minutes late?
Calm-weather odds: 22% · changed +1 pt in 24h
+1 pt
24%
Yes 24%
No 76%
Arrive at VPS more than an hour late?
Calm-weather odds: 6% · changed +3 pts in 24h
+3 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: <1% · changed +1 pt in 24h
+1 pt
2%
Yes 2%
No 98%
How late will it get to VPS?
On time or early
73%
15–30 min late
13%
30 min–1 hour late
4%
1–2 hours late
6%
Over 2 hours late
3%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
1.3 in of rain, thunderstorms forecast at VPS that day
↑
Later flights pick up delays from earlier in the day
↑
This flight has been late 39% of the time recently
↓
Mostly benign weather forecast at STL
↓
VPS usually runs smoothly
Weather at each end
STL (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
VPS (destination)
Gusts 17 kt Ceiling 2,200 ft Visibility 9 mi Precip 1.34 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.