Schedule: the flights that flew on Tuesday, Sep 29, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

UNITED · FLIGHT UA 520 SCHEDULED · TYPICAL SCHEDULE

Tuesday, October 6

UA 520 · SFO → SLC

departs 1:49 PM PT · arrives 4:50 PM MT

Forecast issued Sun 5:00 AM ET · 60h before departure

Arrive at SLC more than 15 minutes late?

15% chance · ±1 pts – · 24h

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

How late will it get to SLC?

On time or early
85%
15–30 min late
7%
30 min–1 hour late
4%
1–2 hours late
2%
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

↑ 1pm departures from SFO are often late

↑ This flight has been late 19% of the time recently

↑ SFO is prone to delays

↓ Tuesdays in October are usually quieter than average

↓ Visibility down to 0.7 mi forecast at SFO that day

Weather at each end

SFO (origin) Gusts13 kt Ceilingnone (clear) Visibility0.7 mi Precipnone

SLC (destination) Gusts16 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 520 · SFO → SLC

Odds over time

How late will it get to SLC?