Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
UNITED · FLIGHT UA 1543SCHEDULED · TYPICAL SCHEDULE
UA 1543 · EWR → SJU
departs 7:45 PM ET · arrives 11:50 PM AT
Forecast issued Sat 9:00 AM ET · 59h before departure
Odds over time
Arrive at SJU more than 15 minutes late?
31%chance · ±3 pts– · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to SJU?
On time or early
68%
15–30 min late
9%
30 min–1 hour late
9%
1–2 hours late
10%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.