Schedule: a typical summer Thursday (the flights of Jul 30, 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
Thursday, October 1
WN 4390 · DAL → BHM
departs 8:15 PM CT · arrives 10:00 PM CT
Forecast issued Thu 10:00 PM ET · 1h after departure
Watch this flight
Other days
Thu 10/1
Today 52%
Sun 10/4 42%
Mon 10/5 24%
Fri 10/9 33%
Odds over time
Arrive at BHM more than 15 minutes late?
46%
chance · ±2 pts
−18 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
46%
Leave 15+ late
62%
Arrive 1h+ late
14%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
25%
50%
75%
100%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at BHM more than 15 minutes late?
Calm-weather odds: 45% · changed −18 pts in 24h
−18 pts
46%
Yes 46%
No 54%
Leave DAL more than 15 minutes late?
Calm-weather odds: 61% · changed −10 pts in 24h
−10 pts
62%
Yes 62%
No 38%
Arrive at BHM more than an hour late?
Calm-weather odds: 14% · changed −6 pts in 24h
−6 pts
14%
Yes 14%
No 86%
Cancelled?
Calm-weather odds: 1% · changed −10 pts in 24h
−10 pts
1%
Yes 1%
No 99%
How late will it get to BHM?
On time or early
53%
15–30 min late
8%
30 min–1 hour late
24%
1–2 hours late
6%
Over 2 hours late
7%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 500 ft, visibility down to 1.25 mi, 3.1 in of rain, thunderstorms forecast at DAL that day
↑
Later flights pick up delays from earlier in the day
↑
DAL is prone to delays
↓
Mostly benign weather forecast at BHM
↓
BHM usually runs smoothly
Weather at each end
DAL (origin)
Gusts 22 kt Ceiling 500 ft Visibility 1.25 mi Precip 3.06 in
BHM (destination)
Gusts 17 kt Ceiling 5,500 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.