UA8159United Airlines · SFO → PDX
live · 6m ago
Route confirmed United Airlines

UA8159 San FranciscoSFO PortlandPDX

UA8159 by United Airlines flies from San Francisco (SFO) to Portland (PDX).

Right nowNext departure today Operates daily
23:15

scheduled from SFO

The route today

live boards
SFOSan FranciscoOn-time likelySFO delay board →
PDXPortlandOn-time likelyPDX delay board →
SFO→PDXevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
38%Chance of 15+ min delay
0.9%Chance of cancellation
+9 minTypical airport delay in this weather

Conditions at SFO and PDX are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at San Francisco

Forecast

Tue 10 Nov, local date

High22°Clikely 20°C to 24°C
Low13°Clikely 12°C to 15°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Portland

Forecast

Tue 10 Nov, local date

High16°Clikely 15°C to 18°C
Low13°Clikely 10°C to 14°C
  • 97% chance of rain

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other San Francisco to Portland flights today

same route · United Airlines
UA5777departs 08:10
UA5259departs 08:18
UA2624departs 10:27
UA1953departs 12:45
UA4758departs 12:56
UA1812departs 16:32

If UA8159 is cancelled, these are the other United Airlines nonstop flights from San Francisco to Portland on the same day, with scheduled departure times in SFO local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How UA8159 actually runs

Pro Flight Search has tracked every published board update for UA8159 across the SFO and PDX boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at SFO and PDX.

The verdict above is that record speaking, so it reflects how UA8159 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around UA8159? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: UA8159 San Francisco to Portland on-time performance, measured from the SFO and PDX airport boards.

Canonical URL
https://proflightsearch.com/flight/UA8159
How we measure this →