UA1939United Airlines · PDX → SFO
live · 9m ago
Route confirmed United Airlines

UA1939 PortlandPDX San FranciscoSFO

UA1939 by United Airlines flies from Portland (PDX) to San Francisco (SFO).

Right nowNext departure tomorrow Operates daily
06:00

scheduled from PDX

The route today

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

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
40%Chance of 15+ min delay
1.0%Chance of cancellation
+8 minTypical airport delay in this weather

Conditions at PDX and SFO 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 PDX

Forecast

Thu 12 Nov, local date

High15°Clikely 14°C to 17°C
Low10°Clikely 8°C to 12°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 SFO

Forecast

Thu 12 Nov, local date

High20°Clikely 19°C to 22°C
Low13°Clikely 11°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.

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 Portland to San Francisco flights today

same route · United Airlines
UA5503departs 05:30
UA611departs 05:30
UA2818departs 07:10
UA1114departs 09:00
UA5733departs 10:51
UA4782departs 10:59

If UA1939 is cancelled, these are the other United Airlines nonstop flights from Portland to San Francisco on the same day, with scheduled departure times in PDX 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 UA1939 actually runs

Pro Flight Search has tracked every published board update for UA1939 across the PDX and SFO boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at PDX and SFO.

The verdict above is that record speaking, so it reflects how UA1939 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around UA1939? 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: UA1939 Portland to San Francisco on-time performance, measured from the PDX and SFO airport boards.

Canonical URL
https://proflightsearch.com/flight/UA1939
How we measure this →