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 3991
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Yesterday
WN 3991 · STS → BUR
departs 11:10 AM PT · arrives 12:40 PM PT
Forecast issued Fri 10:00 PM ET · 8h after departure
Watch this flight
Other days
Fri 10/2
Mon 10/5 13%
Fri 10/9 15%
Odds over time
Arrive at BUR more than 15 minutes late?
9%
chance · ±0 pts
−5 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
9%
Leave 15+ late
13%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
3.7d
2d
1d
12h
6h
Departs
Lands
Arrive at BUR more than 15 minutes late?
Calm-weather odds: 9% · changed −5 pts in 24h
−5 pts
9%
Yes 9%
No 91%
Leave STS more than 15 minutes late?
Calm-weather odds: 13% · changed −3 pts in 24h
−3 pts
13%
Yes 13%
No 87%
Arrive at BUR more than an hour late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
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 BUR?
On time or early
90%
15–30 min late
3%
30 min–1 hour late
3%
1–2 hours late
3%
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
↓
Mostly benign weather forecast at BUR
↓
Visibility down to 1.5 mi forecast at STS that day
Weather at each end
STS (origin)
Gusts 5 kt Ceiling none (clear) Visibility 1.25 mi Precip none
BUR (destination)
Gusts 15 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.