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.

UNITED · FLIGHT UA 1257 SCHEDULED · TYPICAL SCHEDULE

Sunday, October 4

UA 1257 · SFO → SAN

departs 12:21 PM PT · arrives 2:08 PM PT

Forecast issued Sat 12:00 AM ET · 39h before departure

Arrive at SAN more than 15 minutes late?

24% chance · ±4 pts +2 pts · 24h

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

How late will it get to SAN?

On time or early
75%
15–30 min late
11%
30 min–1 hour late
5%
1–2 hours late
5%
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

↑ 12pm departures from SFO are often late

↑ This flight has been late 30% of the time recently

↑ SAN is prone to delays

↓ Mostly benign weather forecast at SFO

↓ Mostly benign weather forecast at SAN

Weather at each end

SFO (origin) Gusts12 kt Ceilingnone (clear) Visibility7 mi Precipnone

SAN (destination) Gusts13 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.

UA 1257 · SFO → SAN

Odds over time

How late will it get to SAN?