Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 39
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 39 · DAL → HOU
departs 4:15 PM CT · arrives 5:30 PM CT
Forecast issued Fri 11:00 AM ET · 54h before departure
Watch this flight
Other days
Sun 10/4
Thu 10/8 16%
Odds over time
Arrive at HOU more than 15 minutes late?
31%
chance · ±2 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
31%
Leave 15+ late
31%
Arrive 1h+ late
9%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.8d
Now
1d
12h
6h
Departs
Lands
Arrive at HOU more than 15 minutes late?
Calm-weather odds: 19% · changed – in 24h
–
31%
Yes 31%
No 69%
Leave DAL more than 15 minutes late?
Calm-weather odds: 26% · changed – in 24h
–
31%
Yes 31%
No 69%
Arrive at HOU more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
2%
Yes 2%
No 98%
How late will it get to HOU?
On time or early
67%
15–30 min late
7%
30 min–1 hour late
15%
1–2 hours late
6%
Over 2 hours late
3%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 600 ft, 0.5 in of rain forecast at HOU that day
↑
Later flights pick up delays from earlier in the day
↑
This flight has been late 29% of the time recently
↓
Other factors
↓
Sundays in October are usually quieter than average
Weather at each end
DAL (origin)
Gusts 18 kt Ceiling 600 ft Visibility 9 mi Precip 0.07 in
HOU (destination)
Gusts 19 kt Ceiling 600 ft Visibility 10+ mi Precip 0.52 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.