Route Reliability
Portland → San Francisco
PDX–SFO · 550 miles · Portland International Airport to San Francisco International Airport
- 76%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 0.5%
- Cancelled
- 3,764
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Alaska Airlines76%1,696 flights
- 2.United Airlines76%2,048 flights
Not enough history to rank: Frontier Airlines (20 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning-you made the right choice.
PDX–SFO flights departing between 3–6 AM arrived on time 96% of the time, versus 59% between 6–9 PM.
Skip Thursday if you can.
PDX–SFO flights arrived on time 84% of the time on Saturdays. On Thursdays: 72%.
Not much between Alaska Airlines and United Airlines.
On this route they all land within 76% to 76% on time. Pick on schedule and price.
Recent months have been rougher.
PDX–SFO flights arrived on time 65% of the time over the last three months in the data, compared with 77% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon76%(569 flights)
- Tue81%(512 flights)
- Wed73%(511 flights)
- Thu72%(545 flights)
- Fri74%(559 flights)
- Sat84%(484 flights)
- Sun74%(561 flights)
- 3–6 AM96%(288 flights)
- 6–9 AM68%(766 flights)
- 9 AM–12 PM76%(580 flights)
- 12–3 PM83%(699 flights)
- 3–6 PM78%(847 flights)
- 6–9 PM59%(365 flights)
- 9 PM–12 AM78%(196 flights)
Jun 86% → May 48% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 86% | 332 |
| July 2025 | 80% | 342 |
| August 2025 | 83% | 344 |
| September 2025 | 82% | 329 |
| October 2025 | 75% | 360 |
| November 2025 | 77% | 303 |
| December 2025 | 73% | 265 |
| January 2026 | 85% | 285 |
| February 2026 | 73% | 271 |
| March 2026 | 89% | 300 |
| April 2026 | 58% | 312 |
| May 2026 | 48% | 298 |
Same trip, other airports
Keep nerding
Based on 3,764 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.