Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4399
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
WN 4399 · DAL → LBB
departs 8:40 AM CT · arrives 9:50 AM CT
Forecast issued Sat 1:00 AM ET · 57h before departure
Watch this flight
Other days
Sun 10/4 16%
Mon 10/5
Fri 10/9 7%
Odds over time
Arrive at LBB more than 15 minutes late?
8%
chance · ±0 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
8%
Leave 15+ late
10%
Arrive 1h+ late
1%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
3%
6%
9%
12%
6.4d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at LBB more than 15 minutes late?
Calm-weather odds: 6% · changed – in 24h
–
8%
Yes 8%
No 92%
Leave DAL more than 15 minutes late?
Calm-weather odds: 8% · changed – in 24h
–
10%
Yes 10%
No 90%
Arrive at LBB more than an hour late?
Calm-weather odds: 1% · changed – in 24h
–
1%
Yes 1%
No 99%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to LBB?
On time or early
92%
15–30 min late
3%
30 min–1 hour late
4%
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
↑
DAL is prone to delays
↑
LBB is prone to delays
↑
Other factors
↓
Arrivals into LBB at that hour are usually not late
↓
Mostly benign weather forecast at DAL
Weather at each end
DAL (origin)
Gusts 13 kt Ceiling none (clear) Visibility 10+ mi Precip none
LBB (destination)
Gusts 6 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.