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 4389
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 4389 · DAL → BHM
departs 3:55 PM CT · arrives 5:35 PM CT
Forecast issued Wed 12:00 PM ET · 5h before departure
Watch this flight
Other days
Today
Thu 10/1 60%
Fri 10/2 58%
Sun 10/4 40%
Mon 10/5 26%
Tue 10/6 19%
Odds over time
Arrive at BHM more than 15 minutes late?
40%
chance · ±0 pts
+7 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
40%
Leave 15+ late
43%
Arrive 1h+ late
7%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.9d
2d
1d
12h
Now
Departs
Lands
Arrive at BHM more than 15 minutes late?
Calm-weather odds: 20% · changed +7 pts in 24h
+7 pts
40%
Yes 40%
No 60%
Leave DAL more than 15 minutes late?
Calm-weather odds: 30% · changed +4 pts in 24h
+4 pts
43%
Yes 43%
No 57%
Arrive at BHM more than an hour late?
Calm-weather odds: 5% · changed −3 pts in 24h
−3 pts
7%
Yes 7%
No 93%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 100%
How late will it get to BHM?
On time or early
60%
15–30 min late
16%
30 min–1 hour late
17%
1–2 hours late
4%
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
↑
Gusts to 27 kt forecast at DAL that day
↑
3pm departures from DAL are often late
↑
DAL is prone to delays
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at BHM
Weather at each end
DAL (origin)
Gusts 27 kt Ceiling 2,100 ft Visibility 10+ mi Precip 0.15 in
BHM (destination)
Gusts 10 kt Ceiling none (clear) 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.