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 3918
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Tomorrow
WN 3918 · STL → FLL
departs 7:30 PM CT · arrives 11:15 PM ET
Forecast issued Tue 8:00 PM ET · 24h before departure
Watch this flight
Other days
Today 22%
Wed 9/30
Thu 10/1 42%
Fri 10/2 28%
Sat 10/3 23%
Sun 10/4 25%
Mon 10/5 18%
Odds over time
Arrive at FLL more than 15 minutes late?
27%
chance · ±1 pts
+5 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
27%
Leave 15+ late
26%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
Now
12h
6h
Departs
Lands
Arrive at FLL more than 15 minutes late?
Calm-weather odds: 16% · changed +5 pts in 24h
+5 pts
27%
Yes 27%
No 73%
Leave STL more than 15 minutes late?
Calm-weather odds: 24% · changed +3 pts in 24h
+3 pts
26%
Yes 26%
No 74%
Arrive at FLL more than an hour late?
Calm-weather odds: 4% · changed +1 pt in 24h
+1 pt
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to FLL?
On time or early
72%
15–30 min late
11%
30 min–1 hour late
9%
1–2 hours late
4%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
0.3 in of rain forecast at FLL that day
↑
7pm departures from STL are often late
↑
Later flights pick up delays from earlier in the day
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at STL
Weather at each end
STL (origin)
Gusts 13 kt Ceiling 9,000 ft Visibility 10+ mi Precip none
FLL (destination)
Gusts 15 kt Ceiling 7,000 ft Visibility 10+ mi Precip 0.33 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.