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 3539
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Tomorrow
WN 3539 · SAN → SJC
departs 2:10 PM PT · arrives 3:35 PM PT
Forecast issued Sat 7:00 PM ET · 22h before departure
Watch this flight
Other days
Sun 10/4
Mon 10/5 28%
Fri 10/9 35%
Odds over time
Arrive at SJC more than 15 minutes late?
35%
chance · ±3 pts
+2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
35%
Leave 15+ late
33%
Arrive 1h+ late
8%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.8d
2d
Now
12h
6h
Departs
Lands
Arrive at SJC more than 15 minutes late?
Calm-weather odds: 30% · changed +2 pts in 24h
+2 pts
35%
Yes 35%
No 65%
Leave SAN more than 15 minutes late?
Calm-weather odds: 31% · changed +5 pts in 24h
+5 pts
33%
Yes 33%
No 67%
Arrive at SJC more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SJC?
On time or early
65%
15–30 min late
16%
30 min–1 hour late
11%
1–2 hours late
7%
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
↑
2pm departures from SAN are often late
↑
This flight has been late 37% of the time recently
↑
SAN is prone to delays
↓
Mostly benign weather forecast at SAN
↓
Mostly benign weather forecast at SJC
Weather at each end
SAN (origin)
Gusts 14 kt Ceiling none (clear) Visibility 10+ mi Precip none
SJC (destination)
Gusts 14 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.