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 3937
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
WN 3937 · STL → LAX
departs 8:10 AM CT · arrives 10:05 AM PT
Forecast issued Thu 10:00 PM ET · 13h after departure
Watch this flight
Other days
Thu 10/1
Sun 10/4 11%
Mon 10/5 10%
Fri 10/9 14%
Odds over time
Arrive at LAX more than 15 minutes late?
18%
chance · ±0 pts
−14 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
18%
Leave 15+ late
13%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at LAX more than 15 minutes late?
Calm-weather odds: 18% · changed −14 pts in 24h
−14 pts
18%
Yes 18%
No 82%
Leave STL more than 15 minutes late?
Calm-weather odds: 13% · changed −15 pts in 24h
−15 pts
13%
Yes 13%
No 87%
Arrive at LAX more than an hour late?
Calm-weather odds: 3% · changed −6 pts in 24h
−6 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to LAX?
On time or early
82%
15–30 min late
11%
30 min–1 hour late
3%
1–2 hours late
2%
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 500 ft, visibility down to 2.66667 mi, 0.6 in of rain forecast at STL that day
↑
LAX is prone to delays
↑
This flight has been late 17% of the time recently
↓
Early flights usually leave on time
↓
Thursdays in October are usually quieter than average
Weather at each end
STL (origin)
Gusts 25 kt Ceiling 2,420 ft Visibility 4.4 mi Precip 0.12 in
LAX (destination)
Gusts 13 kt Ceiling 1,000 ft Visibility 6 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.