Schedule: the flights that flew on Saturday, Oct 24, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3999
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 31 Tomorrow
WN 3999 · SNA → OAK
departs 4:57 PM PT · arrives 6:33 PM PT
Forecast issued Fri 6:00 PM ET · 26h before departure
Watch this flight
Other days
Today 100%
Sat 10/31
Mon 11/2 33%
Thu 11/5 43%
Odds over time
Arrive at OAK more than 15 minutes late?
28%
chance · ±0 pts
+6 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
28%
Leave 15+ late
39%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.8d
2d
Now
12h
6h
Departs
Lands
Arrive at OAK more than 15 minutes late?
Calm-weather odds: 22% · changed +6 pts in 24h
+6 pts
28%
Yes 28%
No 72%
Leave SNA more than 15 minutes late?
Calm-weather odds: 38% · changed +9 pts in 24h
+9 pts
39%
Yes 39%
No 61%
Arrive at OAK more than an hour late?
Calm-weather odds: 6% · changed +2 pts in 24h
+2 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to OAK?
On time or early
72%
15–30 min late
5%
30 min–1 hour late
16%
1–2 hours late
4%
Over 2 hours late
2%
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
↑
WN's recent on-time record
↑
Arrivals into OAK at that hour are often late
↓
Other factors
Weather at each end
SNA (origin)
Gusts 10 kt Ceiling 3,500 ft Visibility 9 mi Precip 0.09 in
OAK (destination)
Gusts 12 kt Ceiling 7,000 ft 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.