Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.

AMERICAN · FLIGHT AA 1238 SCHEDULED · TYPICAL SCHEDULE

Tuesday, September 29

AA 1238 · PHX → ONT

departs 8:30 PM MT · arrives 9:43 PM PT

Forecast issued Tue 10:00 PM ET · 2h before departure

Arrive at ONT more than 15 minutes late?

53% chance · ±2 pts +11 pts · 24h

HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.

How late will it get to ONT?

On time or early
46%
15–30 min late
24%
30 min–1 hour late
11%
1–2 hours late
10%
Over 2 hours late
5%
Cancelled
2%

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

What’s moving the odds

↑ Cloud base down to 1,300 ft, visibility down to 0.5 mi, 0.3 in of rain, thunderstorms forecast at PHX that day

↑ AA's recent on-time record

↑ 8pm departures from PHX are often late

↓ Tuesdays in September are usually quieter than average

↓ Mostly benign weather forecast at ONT

Weather at each end

PHX (origin) Gusts21 kt Ceiling1,300 ft Visibility0.5 mi Precip0.34 in

ONT (destination) Gusts19 kt Ceilingnone (clear) Visibility9 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 1238 · PHX → ONT

Odds over time

How late will it get to ONT?