Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4937
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 4937 · STL → CLT
departs 4:50 PM CT · arrives 7:40 PM ET
Forecast issued Wed 10:00 AM ET · 8h before departure
Watch this flight
Other days
Today
Thu 10/1 31%
Fri 10/2 28%
Sun 10/4 23%
Mon 10/5 16%
Tue 10/6 21%
Odds over time
Arrive at CLT more than 15 minutes late?
33%
chance · ±0 pts
+18 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
33%
Leave 15+ late
29%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.9d
2d
1d
12h
Now
6h
Departs
Lands
Arrive at CLT more than 15 minutes late?
Calm-weather odds: 15% · changed +18 pts in 24h
+18 pts
33%
Yes 33%
No 67%
Leave STL more than 15 minutes late?
Calm-weather odds: 28% · changed +3 pts in 24h
+3 pts
29%
Yes 29%
No 71%
Arrive at CLT more than an hour late?
Calm-weather odds: 4% · changed −1 pt in 24h
−1 pt
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 CLT?
On time or early
67%
15–30 min late
25%
30 min–1 hour late
3%
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
↑
Arrivals into CLT at that hour are often late
↑
Later flights pick up delays from earlier in the day
↑
4pm departures from STL are often late
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at CLT
Weather at each end
STL (origin)
Gusts 14 kt Ceiling 9,000 ft Visibility 10+ mi Precip none
CLT (destination)
Gusts 5 kt Ceiling none (clear) Visibility 9 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.