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 4420
SCHEDULED · TYPICAL SCHEDULE
Tomorrow
F9 4420 · BDL → SJU
departs 1:42 PM ET · arrives 5:46 PM AT
Forecast issued Thu 9:00 AM ET · 29h before departure
Odds over time
Arrive at SJU more than 15 minutes late?
50%
chance · ±5 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 SJU?
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On time or early
49%
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15–30 min late
22%
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30 min–1 hour late
11%
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1–2 hours late
10%
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Over 2 hours late
6%
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Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.