Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 1431
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
WN 1431 · MDW → HOU
departs 7:15 PM CT · arrives 9:50 PM CT
Forecast issued Sat 1:00 AM ET · 67h before departure
Watch this flight
Other days
Sun 10/4 15%
Mon 10/5
Fri 10/9 30%
Odds over time
Arrive at HOU more than 15 minutes late?
20%
chance · ±5 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
20%
Leave 15+ late
28%
Arrive 1h+ late
4%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.8d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at HOU more than 15 minutes late?
Calm-weather odds: 18% · changed – in 24h
–
20%
Yes 20%
No 80%
Leave MDW more than 15 minutes late?
Calm-weather odds: 25% · changed – in 24h
–
28%
Yes 28%
No 72%
Arrive at HOU more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to HOU?
On time or early
79%
15–30 min late
9%
30 min–1 hour late
7%
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
↑
Later flights pick up delays from earlier in the day
↑
Arrivals into HOU at that hour are often late
↑
7pm departures from MDW are often late
↓
Mostly benign weather forecast at MDW
↓
Mondays in October are usually quieter than average
Weather at each end
MDW (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
HOU (destination)
Gusts 17 kt Ceiling 4,800 ft Visibility 10+ 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.