Schedule: FAA flight plans.
SOUTHWEST · FLIGHT WN 1577
DELAYED: NOW PLANNED TO TAKE OFF 9:19 PM PT (3 H 37 MIN LATER THAN FIRST FILED)
Today
WN 1577 · LAS → ONT
departs 5:27 PM PT · arrives 6:40 PM PT
Forecast issued Fri 4:00 PM ET · 4h before departure
Odds over time
Arrive at ONT more than 15 minutes late?
100%
chance · ±0 pts
+21 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
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How late will it get to ONT?
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On time or early
21%
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15–30 min late
35%
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30 min–1 hour late
0%
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1–2 hours late
32%
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Over 2 hours late
3%
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Cancelled
9%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.