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 3919
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 3919 · STL → HOU
departs 5:25 AM CT · arrives 7:30 AM CT
Forecast issued Wed 1:00 AM ET · 5h before departure
Watch this flight
Other days
Today
Thu 10/1 5%
Fri 10/2 3%
Sat 10/3 4%
Sun 10/4 4%
Mon 10/5 7%
Tue 10/6 3%
Odds over time
Arrive at HOU more than 15 minutes late?
6%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
6%
Leave 15+ late
3%
Arrive 1h+ late
2%
Cancelled
2%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
3%
6%
9%
12%
2.8d
2d
1d
12h
Now
Departs
Lands
Arrive at HOU more than 15 minutes late?
Calm-weather odds: 3% · changed +2 pts in 24h
+2 pts
6%
Yes 6%
No 94%
Leave STL more than 15 minutes late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Arrive at HOU more than an hour late?
Calm-weather odds: <1% · changed +1 pt in 24h
+1 pt
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +1 pt in 24h
+1 pt
2%
Yes 2%
No 98%
How late will it get to HOU?
On time or early
92%
15–30 min late
3%
30 min–1 hour late
1%
1–2 hours late
1%
Over 2 hours late
<1%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Gusts to 25 kt, 0.4 in of rain forecast at HOU that day
↑
HOU is prone to delays
↓
Early flights usually leave on time
↓
5am departures from STL are usually not late
Weather at each end
STL (origin)
Gusts 13 kt Ceiling 8,000 ft Visibility 10+ mi Precip none
HOU (destination)
Gusts 25 kt Ceiling 7,000 ft Visibility 10+ mi Precip 0.37 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.