Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3971
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
WN 3971 · STL → PIT
departs 10:05 AM CT · arrives 12:40 PM ET
Forecast issued Fri 8:00 PM ET · 9h after departure
Watch this flight
Other days
Today
Sat 10/3 8%
Mon 10/5 7%
Odds over time
Arrive at PIT more than 15 minutes late?
7%
chance · ±0 pts
−3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
7%
Leave 15+ late
13%
Arrive 1h+ late
2%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
3.5d
2d
1d
12h
6h
Departs
Lands
Arrive at PIT more than 15 minutes late?
Calm-weather odds: 7% · changed −3 pts in 24h
−3 pts
7%
Yes 7%
No 93%
Leave STL more than 15 minutes late?
Calm-weather odds: 13% · changed −7 pts in 24h
−7 pts
13%
Yes 13%
No 87%
Arrive at PIT more than an hour late?
Calm-weather odds: 2% · changed −2 pts in 24h
−2 pts
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to PIT?
On time or early
92%
15–30 min late
2%
30 min–1 hour late
3%
1–2 hours late
2%
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
↑
Cloud base down to 700 ft, 0.3 in of rain forecast at PIT that day
↑
Other factors
↓
PIT usually runs smoothly
↓
Early flights usually leave on time
Weather at each end
STL (origin)
Gusts 20 kt Ceiling 600 ft Visibility 9 mi Precip 0.01 in
PIT (destination)
Gusts 21 kt Ceiling 500 ft Visibility 5 mi Precip 0.12 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.