Best Time to Fly DTW to PDX: On-Time Stats by Hour & Airline
Detroit Metro Wayne County → Portland International
Data through July 2026 · Last updated October 18, 2026
379 flights were scheduled from Detroit (DTW) to Portland (PDX) in the last 12 months, and 70.0% of those that flew arrived on time, 7.7 points below the US average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
September has been the best month (90% on time) and Thursday the weakest day of the week (68%).
1.1% of flights were cancelled, versus 1.8% nationally.
DTW 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 |
|---|---|---|---|---|
| Delta Air Lines | 70.0% | 62 min | 1.1% | 379 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DTW to PDX
On-time arrival % by scheduled departure hour (local time), 727 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 86.2% | 0.0% | 254 |
| 9am–10am | 68.1% | 0.0% | 69 |
| 10am–11am | Limited data | 2 | |
| 3pm–4pm | Limited data | 1 | |
| 4pm–5pm | Limited data | 3 | |
| 6pm–7pm | Limited data | 9 | |
| 7pm–8pm | 62.0% | 1.4% | 73 |
| 8pm–9pm | 64.1% | 1.3% | 316 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DTW 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 | 12 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 26 | ||
| Summer peak (Jun 15 - Aug 15) | 72.5% | -2.1 pts | 1.0% | 206 |
| All other days | 74.7% | — | 0.6% | 483 |
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).