Best Time to Fly PDX to LAX: On-Time Stats by Hour & Airline
Portland International → Los Angeles International
Data through July 2026 · Last updated October 18, 2026
4,345 flights were scheduled from Portland (PDX) to Los Angeles (LAX) in the last 12 months, and 86.8% of those that flew arrived on time, 9.2 points above the US average of 77.6%.
Delta Air Lines was the most punctual of the 4 airlines on the route at 90.3%, while SkyWest Airlines trailed at 80.4%.
September has been the best month (91% on time) and Friday the weakest day of the week (85%).
0.7% of flights were cancelled, versus 1.8% nationally.
PDX to LAX 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 |
|---|---|---|---|---|
| Delta Air Lines | 90.3% | 94 min | 0.9% | 1,691 |
| Alaska Airlines | 86.0% | 45 min | 0.5% | 1,845 |
| Frontier Airlines | 84.2% | 49 min | 1.8% | 219 |
| SkyWest Airlines | 80.4% | 117 min | 0.3% | 590 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PDX to LAX
On-time arrival % by scheduled departure hour (local time), 8,991 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 11 | |
| 6am–7am | 92.2% | 0.5% | 1,348 |
| 7am–8am | 88.9% | 1.0% | 825 |
| 8am–9am | 87.0% | 0.7% | 155 |
| 9am–10am | 90.0% | 0.0% | 210 |
| 10am–11am | 89.4% | 1.2% | 1,176 |
| 11am–12pm | 92.6% | 2.7% | 223 |
| 12pm–1pm | 91.6% | 1.7% | 520 |
| 1pm–2pm | 88.5% | 0.8% | 669 |
| 2pm–3pm | 86.5% | 0.3% | 683 |
| 3pm–4pm | 80.8% | 2.0% | 250 |
| 4pm–5pm | 84.9% | 0.3% | 325 |
| 5pm–6pm | 86.1% | 0.3% | 1,345 |
| 6pm–7pm | 84.6% | 0.0% | 91 |
| 7pm–8pm | 85.6% | 0.3% | 349 |
| 8pm–9pm | 86.5% | 0.6% | 357 |
| 9pm–10pm | 79.4% | 0.7% | 454 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PDX to LAX
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) | 82.8% | -6.6 pts | 1.7% | 177 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.6% | -13.7 pts | 0.3% | 370 |
| Summer peak (Jun 15 - Aug 15) | 85.3% | -4.0 pts | 1.8% | 1,570 |
| All other days | 89.3% | — | 0.5% | 6,874 |
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).