Schedule: a typical Sunday (the flights of Jul 26, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4589
SCHEDULED · TYPICAL SCHEDULE
WN 4589 · LAS → SMF
departs 5:05 AM PT · arrives 6:30 AM PT
Forecast issued Thu 5:00 PM ET · 63h before departure
Odds over time
Arrive at SMF more than 15 minutes late?
5%
chance · ±0 pts
+1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
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How late will it get to SMF?
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On time or early
95%
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15–30 min late
3%
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30 min–1 hour late
<1%
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1–2 hours late
<1%
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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%.