Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4877
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
WN 4877 · SJC → LAX
departs 10:25 AM PT · arrives 11:45 AM PT
Forecast issued Wed 2:00 AM ET · 35h before departure
Watch this flight
Other days
Today 15%
Thu 10/1
Fri 10/2 16%
Sat 10/3 9%
Sun 10/4 12%
Mon 10/5 14%
Tue 10/6 14%
Odds over time
Arrive at LAX more than 15 minutes late?
16%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
12%
Arrive 1h+ late
2%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at LAX more than 15 minutes late?
Calm-weather odds: 11% · changed +0 pts in 24h
+0 pts
16%
Yes 16%
No 84%
Leave SJC more than 15 minutes late?
Calm-weather odds: 11% · changed −1 pt in 24h
−1 pt
12%
Yes 12%
No 88%
Arrive at LAX more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
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
84%
15–30 min late
8%
30 min–1 hour late
5%
1–2 hours late
1%
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
↑
LAX is prone to delays
↑
WN's recent on-time record
↑
LAX is busy at that time
↓
Thursdays in October are usually quieter than average
↓
Cloud base down to 800 ft forecast at LAX that day
Weather at each end
SJC (origin)
Gusts 10 kt Ceiling 800 ft Visibility 6 mi Precip none
LAX (destination)
Gusts 13 kt Ceiling 800 ft Visibility 4 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.