Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3972
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
WN 3972 · STL → PIT
departs 7:55 PM CT · arrives 10:35 PM ET
Forecast issued Sat 6:00 PM ET · 51h before departure
Watch this flight
Other days
Sun 10/4 33%
Mon 10/5
Fri 10/9 28%
Odds over time
Arrive at PIT more than 15 minutes late?
17%
chance · ±3 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
17%
Leave 15+ late
22%
Arrive 1h+ late
4%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.9d
Now
1d
12h
6h
Departs
Lands
Arrive at PIT more than 15 minutes late?
Calm-weather odds: 16% · changed +0 pts in 24h
+0 pts
17%
Yes 17%
No 83%
Leave STL more than 15 minutes late?
Calm-weather odds: 21% · changed +1 pt in 24h
+1 pt
22%
Yes 22%
No 78%
Arrive at PIT more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to PIT?
On time or early
82%
15–30 min late
6%
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
↑
Later flights pick up delays from earlier in the day
↑
7pm departures from STL are often late
↑
WN's recent on-time record
↓
Mondays in October are usually quieter than average
↓
Mostly benign weather forecast at STL
Weather at each end
STL (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
PIT (destination)
Gusts 17 kt Ceiling 2,700 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.