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 3129SCHEDULED · TYPICAL SCHEDULE
AA 3129 · JAC → JFK
departs 9:40 AM MT · arrives 4:15 PM ET
Forecast issued Tue 10:00 PM ET · 38h before departure
Odds over time
Arrive at JFK more than 15 minutes late?
22%chance · ±3 pts+3 pts · 24h
HOW SURE WE AREModerate. The odds now blend history with early weather forecasts.
How late will it get to JFK?
On time or early
78%
15–30 min late
11%
30 min–1 hour late
3%
1–2 hours late
4%
Over 2 hours late
4%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.