Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
AMERICAN · FLIGHT AA 1578SCHEDULED · TYPICAL ODDS
AA 1578 · BOS → LAX
departs 5:33 PM ET · arrives 8:55 PM PT
Forecast issued Mon 10:00 PM ET · 92h before departure
Typical odds
Too early for a weather forecast — these are typical odds for this flight on a Friday in October, from the weather this date has had in past years (the range shows how much they varied). They’ll switch to forecast-based odds about 3 days before departure.
Odds over time
Arrive at LAX more than 15 minutes late?
29%chance · ±5 pts– · 24h
HOW SURE WE ARELow. This is mostly a starting point from history; weather forecasts haven't kicked in yet.
How late will it get to LAX?
On time or early
71%
15 min–1 hour late
20%
Over 1 hour late
9%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.