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 1221 SCHEDULED · TYPICAL SCHEDULE

Sunday, October 4 Tomorrow

AA 1221 · LAX → MIA

departs 10:00 PM PT · arrives 6:14 AM ET

Forecast issued Sat 9:00 AM ET · 40h before departure

Arrive at MIA more than 15 minutes late?

25% chance · ±2 pts +7 pts · 24h

HOW SURE WE ARE Moderate. The odds now blend history with early weather forecasts.

How late will it get to MIA?

On time or early
74%
15–30 min late
11%
30 min–1 hour late
8%
1–2 hours late
4%
Over 2 hours late
2%
Cancelled
<1%

Gate arrival compared with the scheduled arrival. The ranges add up to 100%.

What’s moving the odds

↑ 10pm departures from LAX are often late

↑ Later flights pick up delays from earlier in the day

↑ LAX is prone to delays

↓ Mostly benign weather forecast at LAX

↓ Sundays in October are usually quieter than average

Weather at each end

LAX (origin) Gusts12 kt Ceilingnone (clear) Visibility10+ mi Precipnone

MIA (destination) Gusts18 kt Ceilingnone (clear) Visibility10+ mi Precipnone

How this resolves

Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.

Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.

AA 1221 · LAX → MIA

Odds over time

How late will it get to MIA?