Route Reliability
San Francisco → Portland
SFO–PDX · 550 miles · San Francisco International Airport to Portland International Airport
- 81%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.6%
- Cancelled
- 3,758
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines83%2,047 flights
- 2.Alaska Airlines79%1,694 flights
Not enough history to rank: Frontier Airlines (17 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning-you made the right choice.
SFO–PDX flights departing between 6–9 AM arrived on time 92% of the time, versus 77% between 3–6 PM.
Skip Thursday if you can.
SFO–PDX flights arrived on time 86% of the time on Tuesdays. On Thursdays: 76%.
United Airlines has a slight edge here.
United Airlines arrived on time 83% of the time on this route; Alaska Airlines managed 79%.
Slipping a little lately.
SFO–PDX flights arrived on time 78% of the time over the last three months in the data, compared with 83% 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
- Mon82%(567 flights)
- Tue86%(505 flights)
- Wed81%(506 flights)
- Thu76%(551 flights)
- Fri79%(557 flights)
- Sat86%(485 flights)
- Sun81%(563 flights)
- 6–9 AM92%(527 flights)
- 9 AM–12 PM82%(617 flights)
- 12–3 PM80%(644 flights)
- 3–6 PM77%(582 flights)
- 6–9 PM81%(744 flights)
- 9 PM–12 AM79%(620 flights)
Jun 82% → May 70% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 82% | 330 |
| July 2025 | 81% | 343 |
| August 2025 | 84% | 344 |
| September 2025 | 87% | 328 |
| October 2025 | 82% | 361 |
| November 2025 | 76% | 301 |
| December 2025 | 79% | 261 |
| January 2026 | 86% | 285 |
| February 2026 | 84% | 269 |
| March 2026 | 90% | 300 |
| April 2026 | 73% | 313 |
| May 2026 | 70% | 299 |
Same trip, other airports
Keep nerding
Based on 3,758 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.