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.
FRONTIER · FLIGHT F9 4345
SCHEDULED · TYPICAL SCHEDULE
F9 4345 · DEN → LAX
departs 10:39 PM MT · arrives 12:11 AM PT
Forecast issued Wed 4:00 PM ET · 57h before departure
Odds over time
Arrive at LAX more than 15 minutes late?
30%
chance · ±11 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 LAX?
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On time or early
70%
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15–30 min late
14%
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30 min–1 hour late
6%
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1–2 hours late
5%
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Over 2 hours late
4%
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Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.