Best Time to Fly DEN to PDX: On-Time Stats by Hour & Airline
Denver International → Portland International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 74.9% of Denver (DEN) to Portland (PDX) flights arrived on time (4,285 scheduled flights). That is 2.7 points below the national average of 77.6%.
Among 4 airlines, Frontier Airlines led with 83.5% on time and Southwest Airlines was last with 62.6%.
Over 24 months, Saturday was the most reliable day (78% on time) and June the worst month (63%).
The cancellation rate was 0.2% (US average 1.8%).
DEN 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 |
|---|---|---|---|---|
| Frontier Airlines | 83.5% | 52 min | 0.4% | 280 |
| United Airlines | 82.5% | 57 min | 0.3% | 1,825 |
| Alaska Airlines | 80.2% | 57 min | 0.3% | 612 |
| Southwest Airlines | 62.6% | 48 min | 0.1% | 1,555 |
| SkyWest Airlines | Limited data | 13 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to PDX
On-time arrival % by scheduled departure hour (local time), 8,786 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 2 | |
| 5am–6am | Limited data | 11 | |
| 6am–7am | 93.6% | 0.5% | 205 |
| 7am–8am | 86.9% | 0.0% | 628 |
| 8am–9am | 86.6% | 0.0% | 904 |
| 9am–10am | 84.2% | 0.0% | 292 |
| 10am–11am | 83.6% | 0.0% | 61 |
| 11am–12pm | 81.7% | 0.6% | 1,280 |
| 12pm–1pm | 81.2% | 0.0% | 341 |
| 1pm–2pm | 83.7% | 0.3% | 314 |
| 2pm–3pm | 74.3% | 1.6% | 321 |
| 3pm–4pm | 75.8% | 0.0% | 504 |
| 4pm–5pm | 77.9% | 0.2% | 553 |
| 5pm–6pm | 61.9% | 0.0% | 223 |
| 6pm–7pm | 61.9% | 0.3% | 326 |
| 7pm–8pm | 62.3% | 1.0% | 1,162 |
| 8pm–9pm | 66.9% | 0.3% | 610 |
| 9pm–10pm | 59.6% | 0.4% | 520 |
| 10pm–11pm | 66.6% | 1.7% | 527 |
| 11pm–12am | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DEN 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) | 75.5% | -1.8 pts | 0.0% | 167 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.8% | -5.4 pts | 0.5% | 379 |
| Summer peak (Jun 15 - Aug 15) | 68.4% | -8.9 pts | 0.9% | 1,836 |
| All other days | 77.2% | — | 0.4% | 6,404 |
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).