Schedule: the flights that flew on Wednesday, Oct 21, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

UNITED · FLIGHT UA 1939 SCHEDULED · TYPICAL SCHEDULE

Wednesday, October 28

UA 1939 · PDX → SFO

departs 9:00 AM PT · arrives 11:03 AM PT

Forecast issued Tue 1:00 AM ET · 35h before departure

Arrive at SFO more than 15 minutes late?

15% chance · ±5 pts −1 pt · 24h

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

How late will it get to SFO?

On time or early
85%
15–30 min late
6%
30 min–1 hour late
2%
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

↑ SFO is prone to delays

↑ Arrivals into SFO at that hour are often late

↑ This flight has been late 33% of the time recently

↓ Mostly benign weather forecast at SFO

↓ PDX usually runs smoothly

Weather at each end

PDX (origin) Gusts28 kt Ceiling1,800 ft Visibility10+ mi Precip0.21 in

SFO (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 1939 · PDX → SFO

Odds over time

How late will it get to SFO?