Route Reliability
Portland → San Diego
PDX–SAN · 933 miles · Portland International Airport to San Diego International Airport
- 81%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 0.7%
- Cancelled
- 1,796
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Southwest Airlines86%115 flights
- 2.Alaska Airlines81%1,681 flights
What the data says
Morning-you made the right choice.
PDX–SAN flights departing between 6–9 AM arrived on time 85% of the time, versus 56% between 6–9 PM.
Friday is doing you no favors.
PDX–SAN flights arrived on time 88% of the time on Saturdays. On Fridays: 74%.
Southwest Airlines has a slight edge here.
Southwest Airlines arrived on time 86% of the time on this route; Alaska Airlines managed 81%.
Trending in the right direction.
PDX–SAN flights arrived on time 88% of the time over the last three months in the data, compared with 78% 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
- Mon81%(264 flights)
- Tue85%(240 flights)
- Wed84%(235 flights)
- Thu77%(258 flights)
- Fri74%(259 flights)
- Sat88%(244 flights)
- Sun79%(282 flights)
- 6–9 AM85%(361 flights)
- 9 AM–12 PM83%(404 flights)
- 12–3 PM82%(399 flights)
- 3–6 PM77%(368 flights)
- 6–9 PM56%(36 flights)
- 9 PM–12 AM79%(214 flights)
Jun 82% → May 85% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 82% | 165 |
| July 2025 | 83% | 155 |
| August 2025 | 77% | 146 |
| September 2025 | 87% | 129 |
| October 2025 | 75% | 141 |
| November 2025 | 70% | 145 |
| December 2025 | 68% | 155 |
| January 2026 | 79% | 130 |
| February 2026 | 86% | 122 |
| March 2026 | 87% | 173 |
| April 2026 | 91% | 163 |
| May 2026 | 85% | 158 |
Keep nerding
Based on 1,796 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.