Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3918
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 3918 · STL → FLL
departs 7:30 PM CT · arrives 11:15 PM ET
Forecast issued Tue 4:00 PM ET · 4h before departure
Watch this flight
Other days
Today
Wed 9/30 25%
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?
25%
chance · ±2 pts
+5 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
25%
Leave 15+ late
28%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at FLL more than 15 minutes late?
Calm-weather odds: 20% · changed +5 pts in 24h
+5 pts
25%
Yes 25%
No 75%
Leave STL more than 15 minutes late?
Calm-weather odds: 28% · changed +1 pt in 24h
+1 pt
28%
Yes 28%
No 72%
Arrive at FLL more than an hour late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
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
74%
15–30 min late
9%
30 min–1 hour late
9%
1–2 hours late
5%
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
↑
7pm departures from STL are often late
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into FLL at that hour are often late
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at STL
Weather at each end
STL (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
FLL (destination)
Gusts 26 kt Ceiling 2,500 ft Visibility 0.75 mi Precip 2.19 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.