Schedule: a typical summer Monday (the flights of Jul 27, 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
Monday, October 5
WN 3539 · SAN → SJC
departs 2:30 PM PT · arrives 3:55 PM PT
Forecast issued Sat 4:00 PM ET · 50h before departure
Watch this flight
Other days
Sun 10/4 35%
Mon 10/5
Fri 10/9 35%
Odds over time
Arrive at SJC more than 15 minutes late?
26%
chance · ±4 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
26%
Leave 15+ late
26%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.7d
Now
1d
12h
6h
Departs
Lands
Arrive at SJC more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
26%
Yes 26%
No 74%
Leave SAN more than 15 minutes late?
Calm-weather odds: 24% · changed +1 pt in 24h
+1 pt
26%
Yes 26%
No 74%
Arrive at SJC more than an hour late?
Calm-weather odds: 4% · changed +1 pt in 24h
+1 pt
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 SJC?
On time or early
73%
15–30 min late
12%
30 min–1 hour late
8%
1–2 hours late
5%
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
↓
Mondays in October are usually quieter than average
↓
Mostly benign weather forecast at SJC
Weather at each end
SAN (origin)
Gusts 15 kt Ceiling none (clear) Visibility 10+ mi Precip none
SJC (destination)
Gusts 14 kt Ceiling none (clear) 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.