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 4255
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 4255 · AUS → HOU
departs 5:25 PM CT · arrives 6:30 PM CT
Forecast issued Wed 9:00 PM ET · 3h after departure
Watch this flight
Other days
Today
Thu 10/1 74%
Fri 10/2 56%
Mon 10/5 26%
Tue 10/6 27%
Odds over time
Arrive at HOU more than 15 minutes late?
44%
chance · ±2 pts
−6 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
44%
Leave 15+ late
39%
Arrive 1h+ late
8%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at HOU more than 15 minutes late?
Calm-weather odds: 39% · changed −6 pts in 24h
−6 pts
44%
Yes 44%
No 56%
Leave AUS more than 15 minutes late?
Calm-weather odds: 39% · changed −4 pts in 24h
−4 pts
39%
Yes 39%
No 61%
Arrive at HOU more than an hour late?
Calm-weather odds: 7% · changed −5 pts in 24h
−5 pts
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 99%
How late will it get to HOU?
On time or early
55%
15–30 min late
24%
30 min–1 hour late
12%
1–2 hours late
5%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
This flight has been late 44% of the time recently
↑
5pm departures from AUS are often late
↑
Arrivals into HOU at that hour are often late
↓
Wednesdays in September are usually quieter than average
↓
AUS usually runs smoothly
Weather at each end
AUS (origin)
Gusts 23 kt Ceiling 1,100 ft Visibility 6 mi Precip 0.15 in
HOU (destination)
Gusts 22 kt Ceiling 5,000 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.