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 4128
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 4128 · LAX → DAL
departs 5:05 AM PT · arrives 10:10 AM CT
Forecast issued Wed 7:00 PM ET · 11h after departure
Watch this flight
Other days
Today
Thu 10/1 18%
Fri 10/2 10%
Sun 10/4 44%
Mon 10/5 7%
Tue 10/6 6%
Odds over time
Arrive at DAL more than 15 minutes late?
9%
chance · ±0 pts
+1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
9%
Leave 15+ late
5%
Arrive 1h+ late
<1%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at DAL more than 15 minutes late?
Calm-weather odds: 9% · changed +1 pt in 24h
+1 pt
9%
Yes 9%
No 91%
Leave LAX more than 15 minutes late?
Calm-weather odds: 5% · changed −1 pt in 24h
−1 pt
5%
Yes 5%
No 95%
Arrive at DAL more than an hour late?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to DAL?
On time or early
91%
15–30 min late
6%
30 min–1 hour late
2%
1–2 hours late
<1%
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 27 kt, 0.5 in of rain forecast at DAL that day
↑
This flight has been late 21% of the time recently
↑
DAL is prone to delays
↓
Early flights usually leave on time
↓
5am departures from LAX are usually not late
Weather at each end
LAX (origin)
Gusts 13 kt Ceiling 1,000 ft Visibility 7 mi Precip none
DAL (destination)
Gusts 27 kt Ceiling 2,100 ft Visibility 4 mi Precip 0.38 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.