Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3859
SCHEDULED · TYPICAL SCHEDULE
Tomorrow
WN 3859 · SNA → SJC
departs 8:10 AM PT · arrives 9:30 AM PT
Forecast issued Thu 7:00 PM ET · 16h before departure
Odds over time
Arrive at SJC more than 15 minutes late?
7%
chance · ±0 pts
+3 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
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How late will it get to SJC?
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On time or early
92%
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15–30 min late
0%
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30 min–1 hour late
<1%
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1–2 hours late
6%
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Over 2 hours late
<1%
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Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.