Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
AMERICAN · FLIGHT AA 1521SCHEDULED · TYPICAL SCHEDULE
AA 1521 · MIA → BNA
departs 8:21 AM ET · arrives 9:45 AM CT
Forecast issued Fri 9:00 AM ET · 47h before departure
Odds over time
Arrive at BNA more than 15 minutes late?
10%chance · ±2 pts−3 pts · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to BNA?
On time or early
89%
15–30 min late
3%
30 min–1 hour late
4%
1–2 hours late
2%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.