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 1599
SCHEDULED · TYPICAL SCHEDULE
WN 1599 · TUS → DEN
departs 3:15 PM MT · arrives 6:15 PM MT
Forecast issued Thu 12:00 AM ET · 42h before departure
Odds over time
Arrive at DEN more than 15 minutes late?
35%
chance · ±7 pts
+2 pts · 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 DEN?
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On time or early
65%
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15–30 min late
21%
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30 min–1 hour late
5%
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1–2 hours late
7%
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Over 2 hours late
3%
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Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.