Schedule: the flights that flew on Friday, Oct 23, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

UNITED · FLIGHT UA 552 SCHEDULED · TYPICAL SCHEDULE

Friday, October 30 Tomorrow

UA 552 · SFO → ONT

departs 9:00 PM PT · arrives 10:37 PM PT

Forecast issued Thu 7:00 PM ET · 29h before departure

Arrive at ONT more than 15 minutes late?

31% chance · ±0 pts +7 pts · 24h

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

How late will it get to ONT?

On time or early
68%
15–30 min late
8%
30 min–1 hour late
12%
1–2 hours late
8%
Over 2 hours late
3%
Cancelled
<1%

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

What’s moving the odds

↑ 9pm departures from SFO are often late

↑ UA's recent on-time record

↑ Later flights pick up delays from earlier in the day

↓ Mostly benign weather forecast at SFO

↓ Mostly benign weather forecast at ONT

Weather at each end

SFO (origin) Gusts16 kt Ceilingnone (clear) Visibility10+ mi Precipnone

ONT (destination) Gusts15 kt Ceiling2,700 ft 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.

UA 552 · SFO → ONT

Odds over time

How late will it get to ONT?