Schedule: a typical summer Saturday (the flights of Jul 25, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4390
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
WN 4390 · DAL → BHM
departs 7:45 PM CT · arrives 9:30 PM CT
Forecast issued Thu 11:00 PM ET · 46h before departure
Watch this flight
Other days
Today 53%
Sat 10/3
Sun 10/4 42%
Mon 10/5 24%
Odds over time
Arrive at BHM more than 15 minutes late?
41%
chance · ±3 pts
+8 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
41%
Leave 15+ late
59%
Arrive 1h+ late
12%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
4.9d
Now
1d
12h
6h
Departs
Lands
Arrive at BHM more than 15 minutes late?
Calm-weather odds: 28% · changed +8 pts in 24h
+8 pts
41%
Yes 41%
No 59%
Leave DAL more than 15 minutes late?
Calm-weather odds: 31% · changed +12 pts in 24h
+12 pts
59%
Yes 59%
No 41%
Arrive at BHM more than an hour late?
Calm-weather odds: 6% · changed +3 pts in 24h
+3 pts
12%
Yes 12%
No 88%
Cancelled?
Calm-weather odds: <1% · changed +1 pt in 24h
+1 pt
2%
Yes 2%
No 98%
How late will it get to BHM?
On time or early
58%
15–30 min late
10%
30 min–1 hour late
18%
1–2 hours late
8%
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 400 ft, 0.5 in of rain forecast at DAL that day
↑
7pm departures from DAL are often late
↑
Later flights pick up delays from earlier in the day
↓
BHM usually runs smoothly
↓
Saturdays in October are usually quieter than average
Weather at each end
DAL (origin)
Gusts 14 kt Ceiling 400 ft Visibility 3 mi Precip 0.48 in
BHM (destination)
Gusts 7 kt Ceiling 3,467 ft Visibility 8 mi Precip 0.07 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.