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 · DAL → ATL
departs 10:50 AM CT · arrives 1:55 PM ET
Forecast issued Wed 10:00 AM ET · 2h before departure
Watch this flight
Other days
Today
Thu 10/1 53%
Fri 10/2 35%
Sat 10/3 25%
Mon 10/5 11%
Tue 10/6 14%
Odds over time
Arrive at ATL more than 15 minutes late?
21%
chance · ±0 pts
+4 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
21%
Leave 15+ late
26%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 21% · changed +4 pts in 24h
+4 pts
21%
Yes 21%
No 79%
Leave DAL more than 15 minutes late?
Calm-weather odds: 24% · changed +4 pts in 24h
+4 pts
26%
Yes 26%
No 74%
Arrive at ATL more than an hour late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to ATL?
On time or early
78%
15–30 min late
<1%
30 min–1 hour late
18%
1–2 hours late
1%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Gusts to 27 kt forecast at DAL that day
↑
DAL is prone to delays
↑
This flight has been late 31% of the time recently
↓
Wednesdays in September are usually quieter than average
↓
ATL usually runs smoothly
Weather at each end
DAL (origin)
Gusts 27 kt Ceiling 2,200 ft Visibility 10+ mi Precip 0.15 in
ATL (destination)
Gusts 11 kt Ceiling 300 ft Visibility 0.5 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.