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.
AMERICAN · FLIGHT AA 1621SCHEDULED · TYPICAL SCHEDULE
AA 1621 · PHL → SAN
departs 8:39 AM ET · arrives 11:20 AM PT
Forecast issued Sat 7:00 PM ET · 38h before departure
Odds over time
Arrive at SAN more than 15 minutes late?
15%chance · ±1 pts−4 pts · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to SAN?
On time or early
85%
15–30 min late
5%
30 min–1 hour late
6%
1–2 hours late
3%
Over 2 hours late
1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.