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 770
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 770 · STL → HOU
departs 6:00 PM CT · arrives 8:05 PM CT
Forecast issued Wed 12:00 AM ET · 19h before departure
Watch this flight
Other days
Today
Tue 10/6 19%
Odds over time
Arrive at HOU more than 15 minutes late?
30%
chance · ±0 pts
+4 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
30%
Leave 15+ late
27%
Arrive 1h+ late
8%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at HOU more than 15 minutes late?
Calm-weather odds: 16% · changed +4 pts in 24h
+4 pts
30%
Yes 30%
No 70%
Leave STL more than 15 minutes late?
Calm-weather odds: 22% · changed +4 pts in 24h
+4 pts
27%
Yes 27%
No 73%
Arrive at HOU more than an hour late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to HOU?
On time or early
70%
15–30 min late
12%
30 min–1 hour late
10%
1–2 hours late
7%
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
↑
Gusts to 25 kt, 0.4 in of rain forecast at HOU that day
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into HOU at that hour are often late
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at STL
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.