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 391
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 391 · AUS → SAN
departs 5:45 PM CT · arrives 6:35 PM PT
Forecast issued Fri 11:00 AM ET · 56h before departure
Watch this flight
Other days
Today 54%
Sat 10/3 32%
Sun 10/4
Mon 10/5 28%
Wed 10/7 26%
Thu 10/8 24%
Odds over time
Arrive at SAN more than 15 minutes late?
36%
chance · ±5 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
36%
Leave 15+ late
43%
Arrive 1h+ late
10%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.9d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at SAN more than 15 minutes late?
Calm-weather odds: 28% · changed – in 24h
–
36%
Yes 36%
No 64%
Leave AUS more than 15 minutes late?
Calm-weather odds: 34% · changed – in 24h
–
43%
Yes 43%
No 57%
Arrive at SAN more than an hour late?
Calm-weather odds: 8% · changed – in 24h
–
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to SAN?
On time or early
64%
15–30 min late
14%
30 min–1 hour late
12%
1–2 hours late
7%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Later flights pick up delays from earlier in the day
↑
5pm departures from AUS are often late
↑
Arrivals into SAN at that hour are often late
↓
Mostly benign weather forecast at SAN
↓
AUS usually runs smoothly
Weather at each end
AUS (origin)
Gusts 25 kt Ceiling 700 ft Visibility 10+ mi Precip 0.22 in
SAN (destination)
Gusts 12 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.