United Airlines PDX to SFO on-time performance
United Airlines nonstop flights from Portland to San Francisco · Aug 2025 – Jul 2026
On-time arrivals
66%
arrived < 15 min late
Cancelled
0.3%
6 flights
Avg arrival delay
21 min
59 min when late
Rank on route
#4 of 4
route average 69% on time
Key facts
- United Airlines flights on PDX to SFO arrived on time 66% of the time in Aug 2025 – Jul 2026.
- 0.3% were cancelled, and 10% arrived an hour or more late.
- That ranks #4 of 4 airlines on this route, which averaged 69% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (66%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion66%
- Late-arriving aircraft25%
- Airline (crew, maintenance, cleaning, fueling)9%
- Extreme weather0%
- Security0%
Other airlines on PDX to SFO
- Alaska Airlines70% on time · 18 min avg delay
- SkyWest Airlines83% on time · 13 min avg delay
- Frontier Airlines100% on time · 0 min avg delay
Full PDX to SFO comparison →
United Airlines on-time record across all routes →
1,716 United Airlines flights tracked on this route; 6 cancelled, 0 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.