Schedule: FAA flight plans.
SOUTHWEST · FLIGHT WN 4509
SCHEDULED
Today
WN 4509 · SEA → LAS
departs 12:45 PM PT · arrives 3:03 PM PT
Forecast issued Wed 6:00 AM ET · 10h before departure
Odds over time
Arrive at LAS more than 15 minutes late?
37%
chance · ±6 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 LAS?
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On time or early
63%
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15–30 min late
24%
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30 min–1 hour late
8%
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1–2 hours late
3%
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Over 2 hours late
2%
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Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.