Best Time to Fly MIA to PDX: On-Time Stats by Hour & Airline
Miami International → Portland International
Data through July 2026 · Last updated October 18, 2026
341 flights were scheduled from Miami (MIA) to Portland (PDX) in the last 12 months, and 73.9% of those that flew arrived on time, 3.8 points below the US average of 77.6%.
Among 2 airlines, Alaska Airlines led with 81.6% on time and American Airlines was last with 68.5%.
Over 24 months, Tuesday was the most reliable day (84% on time) and December the worst month (60%).
The cancellation rate was 1.5% (US average 1.8%).
MIA 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 |
|---|---|---|---|---|
| Alaska Airlines | 81.6% | 87 min | 1.4% | 141 |
| American Airlines | 68.5% | 79 min | 1.5% | 200 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MIA to PDX
On-time arrival % by scheduled departure hour (local time), 693 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | Limited data | 1 | |
| 4pm–5pm | 82.6% | 1.6% | 125 |
| 5pm–6pm | Limited data | 16 | |
| 6pm–7pm | Limited data | 26 | |
| 7pm–8pm | 66.1% | 1.2% | 404 |
| 8pm–9pm | 74.0% | 0.0% | 96 |
| 9pm–10pm | Limited data | 25 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MIA 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) | Limited data | 25 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 59.0% | -13.1 pts | 0.0% | 61 |
| Summer peak (Jun 15 - Aug 15) | Limited data | 5 | ||
| All other days | 72.1% | — | 1.2% | 602 |
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).