Best Time to Fly SAN to PDX: On-Time Stats by Hour & Airline
San Diego International → Portland International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.8% of San Diego (SAN) to Portland (PDX) flights arrived on time (1,776 scheduled flights). That is 6.2 points above the national average of 77.6%.
SkyWest Airlines was the most punctual of the 3 airlines on the route at 86.7%, while Southwest Airlines trailed at 60.0%.
April has been the best month (91% on time) and Friday the weakest day of the week (79%).
1.0% of flights were cancelled, versus 1.8% nationally.
SAN to PDX on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 86.7% | 69 min | 0.0% | 30 |
| Alaska Airlines | 86.2% | 55 min | 1.1% | 1,586 |
| Southwest Airlines | 60.0% | 38 min | 0.0% | 160 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAN to PDX
On-time arrival % by scheduled departure hour (local time), 3,550 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 94.2% | 1.3% | 314 |
| 7am–8am | 94.9% | 0.8% | 393 |
| 8am–9am | 89.0% | 2.1% | 93 |
| 10am–11am | 86.6% | 1.0% | 496 |
| 11am–12pm | 79.0% | 0.4% | 231 |
| 1pm–2pm | 76.6% | 1.6% | 126 |
| 2pm–3pm | 84.6% | 0.9% | 696 |
| 3pm–4pm | 39.0% | 0.0% | 41 |
| 4pm–5pm | 86.9% | 0.0% | 61 |
| 5pm–6pm | 79.1% | 0.8% | 241 |
| 6pm–7pm | 79.8% | 1.7% | 409 |
| 7pm–8pm | 63.8% | 0.0% | 47 |
| 8pm–9pm | 67.9% | 2.4% | 287 |
| 9pm–10pm | 86.7% | 1.7% | 115 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SAN to PDX
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 70.5% | -15.4 pts | 1.3% | 79 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.2% | -14.8 pts | 3.7% | 162 |
| Summer peak (Jun 15 - Aug 15) | 77.4% | -8.5 pts | 1.2% | 643 |
| All other days | 85.9% | — | 1.0% | 2,666 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).