Schedule: a typical summer Friday (the flights of Jul 31, 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
Friday, October 2 Today
WN 4399 · DAL → LBB
departs 8:40 AM CT · arrives 9:50 AM CT
Forecast issued Fri 12:00 PM ET · 2h after departure
Watch this flight
Other days
Today
Sun 10/4 15%
Mon 10/5 9%
Wed 10/7 8%
Odds over time
Arrive at LBB more than 15 minutes late?
31%
chance · ±1 pts
−10 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
31%
Leave 15+ late
21%
Arrive 1h+ late
8%
Cancelled
5%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.5d
2d
1d
12h
6h
Departs
Lands
Now
Arrive at LBB more than 15 minutes late?
Calm-weather odds: 32% · changed −10 pts in 24h
−10 pts
31%
Yes 31%
No 69%
Leave DAL more than 15 minutes late?
Calm-weather odds: 20% · changed −5 pts in 24h
−5 pts
21%
Yes 21%
No 79%
Arrive at LBB more than an hour late?
Calm-weather odds: 6% · changed +1 pt in 24h
+1 pt
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: 4% · changed −1 pt in 24h
−1 pt
5%
Yes 5%
No 95%
How late will it get to LBB?
On time or early
65%
15–30 min late
13%
30 min–1 hour late
9%
1–2 hours late
5%
Over 2 hours late
3%
Cancelled
5%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 700 ft, 0.4 in of rain forecast at DAL that day
↑
DAL is prone to delays
↑
Gusts to 31 kt, cloud base down to 800 ft forecast at LBB that day
↓
Arrivals into LBB at that hour are usually not late
↓
Early flights usually leave on time
Weather at each end
DAL (origin)
Gusts 14 kt Ceiling 600 ft Visibility 2.5 mi Precip 0.90 in
LBB (destination)
Gusts 31 kt Ceiling 600 ft Visibility 3 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.