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 851
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 851 · BUR → SMF
departs 1:40 PM PT · arrives 3:00 PM PT
Forecast issued Fri 7:00 PM ET · 46h before departure
Watch this flight
Other days
Today 22%
Sat 10/3 19%
Sun 10/4
Mon 10/5 14%
Odds over time
Arrive at SMF more than 15 minutes late?
28%
chance · ±2 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
28%
Leave 15+ late
27%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.8d
Now
1d
12h
6h
Departs
Lands
Arrive at SMF more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
28%
Yes 28%
No 72%
Leave BUR more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
27%
Yes 27%
No 73%
Arrive at SMF more than an hour late?
Calm-weather odds: 4% · changed +0 pts in 24h
+0 pts
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 SMF?
On time or early
72%
15–30 min late
18%
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
↑
BUR is prone to delays
↑
Other factors
↑
Sundays in October are usually busier than average
↓
Mostly benign weather forecast at SMF
Weather at each end
BUR (origin)
Gusts 18 kt Ceiling none (clear) Visibility 10+ mi Precip none
SMF (destination)
Gusts 7 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.