Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3940
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 3940 · LBB → DAL
departs 12:15 PM CT · arrives 1:25 PM CT
Forecast issued Fri 12:00 PM ET · 49h before departure
Watch this flight
Other days
Today 22%
Sun 10/4
Mon 10/5 7%
Wed 10/7 8%
Odds over time
Arrive at DAL more than 15 minutes late?
19%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
19%
Leave 15+ late
20%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.6d
Now
1d
12h
6h
Departs
Lands
Arrive at DAL more than 15 minutes late?
Calm-weather odds: 11% · changed +0 pts in 24h
+0 pts
19%
Yes 19%
No 81%
Leave LBB more than 15 minutes late?
Calm-weather odds: 12% · changed +2 pts in 24h
+2 pts
20%
Yes 20%
No 80%
Arrive at DAL more than an hour late?
Calm-weather odds: 2% · changed +1 pt in 24h
+1 pt
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to DAL?
On time or early
80%
15–30 min late
9%
30 min–1 hour late
5%
1–2 hours late
4%
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
↑
Cloud base down to 600 ft forecast at DAL that day
↑
Other factors
↑
DAL is prone to delays
↓
Mostly benign weather forecast at LBB
↓
Arrivals into DAL at that hour are usually not late
Weather at each end
LBB (origin)
Gusts 15 kt Ceiling none (clear) Visibility 10+ mi Precip none
DAL (destination)
Gusts 18 kt Ceiling 600 ft Visibility 9 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.