Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
AMERICAN · FLIGHT AA 1259SCHEDULED · TYPICAL SCHEDULE
AA 1259 · BOS → MIA
departs 8:00 AM ET · arrives 11:34 AM ET
Forecast issued Tue 6:00 PM ET · 38h before departure
Odds over time
Arrive at MIA more than 15 minutes late?
16%chance · ±2 pts−5 pts · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to MIA?
On time or early
83%
15–30 min late
8%
30 min–1 hour late
4%
1–2 hours late
2%
Over 2 hours late
2%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.